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

(41) The vegetation of a good land comes forth (easily) by the Permission of its Lord; and that which is bad, brings forth nothing but (a little) with difficulty. Thus do We explain variously the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) for a people who give thanks.

(42) But they belied him, so We saved him and those along with him in the ship, and We drowned those who belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.). They were indeed a blind people.

(43) So We saved him and those who were with him by a mercy from Us, and We cut the roots of those who belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.); and they were not believers.

(44) "And you take vengeance on us only because we believed in the Ayat (proofs, evidence, lessons, signs, etc.) of our Lord when they reached us! Our Lord! pour out on us patience, and cause us to die as Muslims."

(45) They said [to Musa (Moses)]: "Whatever Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) you may bring to us, to work therewith your sorcery on us, we shall never believe in you."

(46) So We took retribution from them. We drowned them in the sea, because they belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and were heedless about them.

(47) I shall turn away from My Ayat (verses of the Qur'an) those who behave arrogantly on the earth, without a right, and (even) if they see all the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they will not believe in them. And if they see the way of righteousness (monotheism, piety, and good deeds), they will not adopt it as the Way, but if they see the way of error (polytheism, crimes and evil deeds), they will adopt that way, that is because they have rejected Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and were heedless (to learn a lesson) from them.

(48) Those who deny Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and the Meeting in the Hereafter (Day of Resurrection,), vain are their deeds. Are they requited with anything except what they used to do?

(49) "And ordain for us good in this world, and in the Hereafter. Certainly we have turned unto You." He said: (As to) My punishment I afflict therewith whom I will and My Mercy embraces all things. That (Mercy) I shall ordain for those who are the Muttaqun (the pious - See V.2:2), and give Zakat; and those who believe in Our Ayat (proofs, evidence, verses, lessons, signs and revelations, etc.);

(50) Thus do We explain the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) in detail, so that they may turn (unto the truth).