The word(s) "lesson" appears 168 time(s) in 166 verse(s) in Quran in Mohsin Khan translation.

(81) Allah is He Who raised the heavens without any pillars that you can see. Then, He rose above (Istawa) the Throne (really in a manner that suits His Majesty). He has subjected the sun and the moon (to continue going round), each running (its course) for a term appointed. He manages and regulates all affairs; He explains the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) in detail, that you may believe with certainty in the meeting with your Lord.

(82) And it is He Who spread out the earth, and placed therein firm mountains and rivers and of every kind of fruits He made Zawjain Ithnain (two in pairs - may mean two kinds or it may mean: of two varieties, e.g. black and white, sweet and sour, small and big). He brings the night as a cover over the day. Verily, in these things, there are Ayat (proofs, evidence, lessons, signs, etc.) for people who reflect.

(83) And in the earth are neighbouring tracts, and gardens of vines, and green crops (fields), and date-palms, growing into two or three from a single stem root, or otherwise (one stem root for every palm), watered with the same water; yet some of them We make more excellent than others to eat. Verily, in these things there are Ayat (proofs, evidence, lessons, signs) for the people who understand.

(84) Surely! In this are signs for those who see (or understand or learn the lessons from the Signs of Allah).

(85) And verily! In the cattle, there is a lesson for you. We give you to drink of that which is in their bellies, from between excretions and blood, pure milk; palatable to the drinkers.

(86) Verily! Those who believe not in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, Allah will not guide them and theirs will be a painful torment.

(87) It is only those who believe not in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, who fabricate falsehood, and it is they who are liars.

(88) Glorified (and Exalted) be He (Allah) [above all that (evil) they associate with Him] Who took His slave (Muhammad صلى الله عليه و سلم) for a journey by night from Al-Masjid-al-Haram (at Makkah) to Al-Masjid-al-Aqsa (in Jerusalem), the neighbourhood whereof We have blessed, in order that We might show him (Muhammad صلى الله عليه و سلم) of Our Ayat (proofs, evidence, lessons, signs, etc.). Verily, He is the All-Hearer, the All-Seer .

(89) That is their recompense, because they denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and said: "When we are bones and fragments, shall we really be raised up as a new creation?"

(90) And We send not the Messengers except as givers of glad tidings and warners. But those who disbelieve, dispute with false argument, in order to refute the truth thereby. And they treat My Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), and that with which they are warned, as a jest and mockery!