The word(s) "thereof" appears 166 time(s) in 142 verse(s) in Quran in Muhammad Pickthal translation.

(131) That ye may thread the valley-ways thereof.

(132) A half thereof, or abate a little thereof

(133) Lo! thy Lord knoweth how thou keepest vigil sometimes nearly two-thirds of the night, or (sometimes) half or a third thereof, as do a party of those with thee. Allah measureth the night and the day. He knoweth that ye count it not, and turneth unto you in mercy. Recite, then, of the Qur'an that which is easy for you. He knoweth that there are sick folk among you, while others travel in the land in search of Allah's bounty, and others (still) are fighting for the cause of Allah. So recite of it that which is easy (for you), and establish worship and pay the poor-due, and (so) lend unto Allah a goodly loan. Whatsoever good ye send before you for your souls, ye will find it with Allah, better and greater in the recompense. And seek forgiveness of Allah. Lo! Allah is Forgiving, Merciful.

(134) Lo! upon Us (resteth) the putting together thereof and the reading thereof.

(135) Then lo! upon Us (resteth) the explanation thereof.

(136) The shade thereof is close upon them and the clustered fruits thereof bow down.

(137) He raised the height thereof and ordered it;

(138) And He made dark the night thereof, and He brought forth the morn thereof.

(139) And produced therefrom the water thereof and the pasture thereof,

(140) Why (ask they)? What hast thou to tell thereof?