The word(s) "lessons" appears 150 time(s) in 149 verse(s) in Quran in Mohsin Khan translation.

(11) Say: "O people of the Scripture (Jews and Christians)! Why do you reject the Ayat of Allah (proofs, evidence, verses, lessons, signs, revelations, etc.) while Allah is Witness to what you do?"

(12) And hold fast, all of you together, to the Rope of Allah (i.e. this Qur'an), and be not divided among yourselves , and remember Allah's Favour on you, for you were enemies one to another but He joined your hearts together, so that, by His Grace, you became brethren (in Islamic Faith), and you were on the brink of a pit of Fire, and He saved you from it. Thus Allah makes His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.,) clear to you, that you may be guided.

(13) Indignity is put over them wherever they may be, except when under a covenant (of protection) from Allah, and from men; they have drawn on themselves the Wrath of Allah, and destruction is put over them. This is because they disbelieved in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah and killed the Prophets without right. This is because they disobeyed (Allah) and used to transgress beyond bounds (in Allah's disobedience, crimes and sins).

(14) Surely! Those who disbelieved in Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), We shall burn them in Fire. As often as their skins are roasted through, We shall change them for other skins that they may taste the punishment. Truly, Allah is Ever Most Powerful, All-Wise.

(15) Because of their breaking the covenant, and of their rejecting the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, and of their killing the Prophets unjustly, and of their saying: "Our hearts are wrapped (with coverings, i.e. we do not understand what the Messengers say)" - nay, Allah has set a seal upon their hearts because of their disbelief, so they believe not but a little.

(16) And those who disbelieve and deny our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) are those who will be the dwellers of the Hell-fire.

(17) The Messiah ['Îsa (Jesus)], son of Maryam (Mary), was no more than a Messenger; many were the Messengers that passed away before him. His mother [Maryam (Mary)] was a Siddiqah [i.e. she believed in the Words of Allah and His Books (see Verse 66:12)]. They both used to eat food (as any other human being, while Allah does not eat). Look how We make the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) clear to them; yet look how they are deluded away (from the truth).

(18) But those who disbelieved and belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they shall be the dwellers of the (Hell) Fire.

(19) Allah will not punish you for what is unintentional in your oaths, but He will punish you for your deliberate oaths; for its expiation feed ten Masakin (poor persons), on a scale of the average of that with which you feed your own families, or clothe them or manumit a slave. But whosoever cannot afford (that), then he should fast for three days. That is the expiation for the oaths when you have sworn . And protect your oaths (i.e. do not swear much) . Thus Allah make clear to you His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) that you may be grateful.

(20) And never an Ayah (sign) comes to them from the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of their Lord, but that they have been turning away from it.