The word(s) "whether" appears 42 time(s) in 39 verse(s) in Quran in Mohsin Khan translation.

(11) Say (O Muhammad صلى الله عليه وسلم): "(But) the things that my Lord has indeed forbidden are Al-Fawahish (great evil sins and every kind of unlawful sexual intercourse) whether committed openly or secretly, sins (of all kinds), unrighteous oppression, joining partners (in worship) with Allah for which He has given no authority, and saying things about Allah of which you have no knowledge."

(12) And if you call them to guidance, they follow you not. It is the same for you whether you call them or you keep silent.

(13) March forth, whether you are light (being healthy, young and wealthy) or heavy (being ill, old and poor), and strive hard with your wealth and your lives in the Cause of Allah. This is better for you, if you but knew.

(14) whether you (O Muhammad صلى الله عليه وسلم) ask forgiveness for them (hypocrites) or ask not forgiveness for them - (and even) if you ask seventy times for their forgiveness - Allah will not forgive them because they have disbelieved in Allah and His Messenger (Muhammad صلى الله عليه وسلم). And Allah guides not those people who are Fasiqun (rebellious, disobedient to Allah).

(15) And others are made to await for Allah's Decree, whether He will punish them or will forgive them. And Allah is All-Knowing, All-Wise.

(16) whether We show you (in your lifetime, O Muhammad صلى الله عليه وسلم) some of what We promise them (the torment), or We cause you to die - still unto Us is their return, and moreover, Allah is Witness over what they used to do.

(17) It is the same (to Him) whether any of you conceal his speech or declares it openly, whether he be hid by night or goes forth freely by day.

(18) whether We show you (O Muhammad صلى الله عليه و سلم) part of what We have promised them or cause you to die, your duty is only to convey (the Message) and on Us is the reckoning.

(19) And they all shall appear before Allah (on the Day of Resurrection); then the weak will say to those who were arrogant (chiefs): "Verily, we were following you; can you avail us anything against Allah's Torment?" They will say: "Had Allah guided us, we would have guided you. It makes no difference to us (now) whether we rage, or bear (these torments) with patience; there is no place of refuge for us."

(20) Whoever works righteousness - whether male or female - while he (or she) is a true believer (of Islamic Monotheism) verily, to him We will give a good life (in this world with respect, contentment and lawful provision), and We shall pay them certainly a reward in proportion to the best of what they used to do (i.e. Paradise in the Hereafter).