The word(s) "knows" appears 80 time(s) in 75 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) He said: "My Lord knows best what ye do."

(32) "(Kept them away from the Path), that they should not worship Allah, Who brings to light what is hidden in the heavens and the earth, and knows what ye hide and what ye reveal.

(33) Say: None in the heavens or on earth, except Allah, knows what is hidden: nor can they perceive when they shall be raised up (for Judgment).

(34) Moses said: "My Lord knows best who it is that comes with guidance from Him and whose end will be best in the Hereafter: certain it is that the wrong-doers will not prosper."

(35) It is true thou wilt not be able to guide every one, whom thou lovest; but Allah guides those whom He will and He knows best those who receive guidance.

(36) And thy Lord knows all that their hearts conceal and all that they reveal.

(37) Verily He Who ordained the Qur'an for thee, will bring thee back to the Place of Return. Say: "My Lord knows best who it is that brings true guidance, and who is in manifest error."

(38) For those whose hopes are in the meeting with Allah (in the Hereafter, let them strive); for the term (appointed) by Allah is surely coming and He hears and knows (all things).

(39) And Allah most certainly knows those who believe, and as certainly those who are Hypocrites.

(40) Recite what is sent of the Book by inspiration to thee, and establish regular Prayer: for Prayer restrains from shameful and unjust deeds; and remembrance of Allah is the greatest (thing in life) without doubt. And Allah knows the (deeds) that ye do.