The word(s) "truly" appears 170 time(s) in 163 verse(s) in Quran in Abdullah Yusuf Ali translation.

(91) truly they found their fathers on the wrong Path;

(92) And truly before them, many of the ancients went astray;-

(93) "Has he made the gods (all) into one Allah? truly this is a wonderful thing!"

(94) And the leader among them go away (impatiently), (saying), "Walk ye away, and remain constant to your gods! For this is truly a thing designed (against you)!

(95) (David) said: "He has undoubtedly wronged thee in demanding thy (single) ewe to be added to his (flock of) ewes: truly many are the partners (in business) who wrong each other: Not so do those who believe and work deeds of righteousness, and how few are they?"... and David gathered that We had tried him: he asked forgiveness of his Lord, fell down, bowing (in prostration), and turned (to Allah in repentance).

(96) And he said, "truly do I love the love of good, with a view to the glory of my Lord,"- until (the sun) was hidden in the veil (of night):

(97) "And take in thy hand a little grass, and strike therewith: and break not (thy oath)." truly We found him full of patience and constancy. How excellent in Our service! ever did he turn (to Us)!

(98) They were, in Our sight, truly, of the company of the Elect and the Good.

(99) truly such will be Our Bounty (to you); it will never fail;-

(100) Here is a troop rushing headlong with you! No welcome for them! truly, they shall burn in the Fire!