The word(s) "trustworthy" appears 13 time(s) in 13 verse(s) in Quran in Mohsin Khan translation.

(11) And said one of them (the two women): "O my father! Hire him! Verily, the best of men for you to hire is the strong, the trustworthy."

(12) And whosoever submits his face (himself) to Allah, while he is a Muhsin (good-doer i.e. performs good deeds totally for Allah's sake without any show off or to gain praise or fame and does them in accordance with the Sunnah of Allah's Messenger Muhammad صلى الله عليه وسلم), then he has grasped the most trustworthy handhold [La ilaha illallah (none has the right to be worshipped but Allah)]. And to Allah return all matters for decision.

(13) Obeyed (by the angels in the heavens), and trustworthy.