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

(131) We have truly sent thee as a witness, as a bringer of Glad Tidings, and as a Warner:

(132) truly did Allah fulfil the vision for His Messenger: ye shall enter the Sacred Mosque, if Allah wills, with minds secure, heads shaved, hair cut short, and without fear. For He knew what ye knew not, and He granted, besides this, a speedy victory.

(133) truly ye are in a doctrine discordant,

(134) "truly, we did call unto Him from of old: truly it is He, the Beneficent, the Merciful!"

(135) For truly did he see, of the Signs of his Lord, the Greatest!

(136) For they said: "What! a man! a Solitary one from among ourselves! shall we follow such a one? truly should we then be straying in mind, and mad!

(137) truly those in sin are the ones straying in mind, and mad.

(138) "Then will ye truly,- O ye that go wrong, and treat (Truth) as Falsehood!-

(139) No misfortune can happen on earth or in your souls but is recorded in a decree before We bring it into existence: That is truly easy for Allah:

(140) If any men among you divorce their wives by Zihar (calling them mothers), they cannot be their mothers: None can be their mothers except those who gave them birth. And in fact they use words (both) iniquitous and false: but truly Allah is one that blots out (sins), and forgives (again and again).