The word(s) "breast" appears 44 time(s) in 41 verse(s) in Quran in Mohsin Khan translation.

(31) And you have (many other) benefits from them, and that you may reach by their means a desire that is in your breasts (i.e. carry your goods, loads, etc.), and on them and on ships you are carried.

(32) Or say they: "He has invented a lie against Allah?" If Allah willed, He could have sealed up your heart (so that you forget all that you know of the Qur'an). And Allah wipes out falsehood, and establishes the truth (Islam) by His Word (this Qur'an). Verily, He knows well what (secrets) are in the breasts (of mankind).

(33) He merges night into day (i.e. the decrease in the hours of the night is added into the hours of the day), and merges day into night (i.e. the decrease in the hours of the day is added into the hours of the night), and He has full knowledge of whatsoever is in the breasts.

(34) And (it is also for) those who, before them, had homes (in Al-Madinah) and had adopted the Faith, love those who emigrate to them, and have no jealousy in their breasts for that which they have been given (from the booty of Banu An-Nadir), and give them (emigrants) preference over themselves even though they were in need of that. And whosoever is saved from his own covetousness, such are they who will be the successful.

(35) Verily, you (believers in the Oneness of Allah - Islamic Monotheism) are more fearful in their (Jews of Banu An-Nadir) breasts than Allah. That is because they are a people who comprehend not (the Majesty and Power of Allah).

(36) He knows what is in the heavens and on earth, and He knows what you conceal and what you reveal. And Allah is the All-Knower of what is in the breasts (of men).

(37) And whether you keep your talk secret or disclose it, Verily, He is the All-Knower of what is in the breasts (of men).

(38) And young full-breasted (mature) maidens of equal age,

(39) Have We not opened your breast for you (O Muhammad صلى الله عليه وسلم)?

(40) And that which is in the breasts (of men) is made known?