The word(s) "rain" appears 104 time(s) in 88 verse(s) in Quran in Mohsin Khan translation.

(81) Calling (all) such as turn their backs and turn away their faces (from Faith) [picking and swallowing them up from that great gathering of mankind on the Day of Resurrection just as a bird picks up a food-grain from the earth with its beak and swallows it up] (Tafsir Al-Qurtubi)

(82) 'He will send rain to you in abundance,

(83) If they (non-Muslims) had believed in Allah, and went on the Right Way (i.e. Islam) We would surely have bestowed on them water (rain) in abundance.

(84) And by the winds that scatter clouds and rain.

(85) And We have sent down from the rainy clouds abundant water.

(86) But as for him who feared standing before his Lord, and restrained himself from impure evil desires and lusts.

(87) And We cause therein the grain to grow,

(88) By the sky (having rain clouds) which gives rain, again and again.