The word(s) "hard" appears 36 time(s) in 35 verse(s) in Quran in Muhammad Pickthal translation.

(31) Is not the time ripe for the hearts of those who believe to submit to Allah's reminder and to the truth which is revealed, that they become not as those who received the scripture of old but the term was prolonged for them and so their hearts were hardened, and many of them are evil-livers.

(32) Let him who hath abundance spend of his abundance, and he whose provision is measured, let him spend of that which Allah hath given him. Allah asketh naught of any soul save that which He hath given it. Allah will vouchsafe, after hardship, ease.

(33) Are ye the harder to create, or is the heaven that He built?

(34) But lo! with hardship goeth ease,

(35) Lo! with hardship goeth ease;