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

(61) And indeed We have sent down for you Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) that make things plain, and the example of those who passed away before you, and an admonition for those who are Al-Muttaqun (the pious - See V.2:2).

(62) Say: "Obey Allah and obey the Messenger, but if you turn away, he (Messenger Muhammad صلى الله عليه وسلم) is only responsible for the duty placed on him (i.e. to convey Allah's Message) and you for that placed on you. If you obey him, you shall be on the right guidance. The Messenger's duty is only to convey (the message) in a clear way (i.e. to preach in a plain way)."

(63) I am only a plain warner."

(64) In the plain Arabic language.

(65) And he entered the city at a time of unawareness of its people: and he found there two men fighting, - one of his party (his religion - from the Children of Israel), and the other of his foes. The man of his (own) party asked him for help against his foe, so Musa (Moses) struck him with his fist and killed him. He said: "This is of Shaitan's (Satan) doing: verily, he is a plain misleading enemy."

(66) So he became afraid, looking about in the city (waiting as to what will be the result of his crime of killing), when behold, the man who had sought his help the day before, called for his help (again). Musa (Moses) said to him: "Verily, you are a plain misleader!"

(67) "And if you deny, then nations before you have denied (their Messengers). And the duty of the Messenger is only to convey (the Message) plainly."

(68) And they say: "Why are not signs sent down to him from his Lord? Say: "The signs are only with Allah, and I am only a plain warner."

(69) He sets forth for you a parable from your ownselves: Do you have partners among those whom your right hands possess (i.e. your slaves) to share as equals in the wealth We have bestowed on you whom you fear as you fear each other? Thus do We explain the signs in detail to a people who have sense.

(70) This is the creation of Allah. So show Me that which those (whom you worship) besides Him have created. Nay, the Zalimun (polytheists, wrongdoers and those who do not believe in the Oneness of Allah) are in plain error.