The word(s) "watcher" appears 12 time(s) in 12 verse(s) in Quran in Mohsin Khan translation.

(11) He is Allah beside Whom La ilaha illa Huwa (none has the right to be worshipped but He), the King, the Holy, the One Free from all defects, the Giver of security, the watcher over His creatures, the All-Mighty, the Compeller, the Supreme. Glory be to Allah! (High is He) above all that they associate as partners with Him.

(12) But they (disbelievers, sinners) had not been sent as watchers over them (the believers).