The word(s) "plain" appears 101 time(s) in 98 verse(s) in Quran in Mohsin Khan translation.

(41) He said: "I only complain of my grief and sorrow to Allah, and I know from Allah that which you know not.

(42) 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.

(43) Alif-Lam-Ra. [These letters are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings].These are Verses of the Book and a plain Qur'an.

(44) So, We took vengeance on them. They are both on an open highway, plain to see.

(45) And say (O Muhammad صلى الله عليه و سلم): "I am indeed a plain warner."

(46) And upon Allah is the responsibility to explain the Straight Path . But there are ways that turn aside (such as Paganism, Judaism and Christianity). And had He willed, He would have guided you all (mankind).

(47) With clear signs and Books (We sent the Messengers). And We have also sent down unto you (O Muhammad صلى الله عليه و سلم) the Dhikr [reminder and the advice (i.e. the Qur'an)], that you may explain clearly to men what is sent down to them, and that they may give thought.

(48) And We have not sent down the Book (the Qur'an) to you (O Muhammad صلى الله عليه و سلم), except that you may explain clearly unto them those things in which they differ, and (as) a guidance and a mercy for a folk who believe.

(49) And We have appointed the night and the day as two Ayat (signs etc.). Then, We have obliterated the sign of the night (with darkness) while We have made the sign of the day illuminating, that you may seek bounty from your Lord, and that you may know the number of the years and the reckoning. And We have explained everything (in detail) with full explanation.

(50) And surely, We have explained [Our Promises, Warnings and (set forth many) examples] in this Qur'an that they (the disbelievers) may take heed, but it increases them in naught save aversion.