The word(s) "ignorance" appears 13 time(s) in 13 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) When those who disbelieved harbored in their hearts (feelings of) disdain, the disdain of (the days of) ignorance, but Allah sent down His tranquillity on His Apostle and on the believers, and made them keep the word of guarding (against evil), and they were entitled to it and worthy of it; and Allah is Cognizant of all things.

(12) O you who believe! if an evil-doer comes to you with a report, look carefully into it, lest you harm a people in ignorance, then be sorry for what you have done.

(13) Who are in a gulf (of ignorance) neglectful;