The word(s) "son" appears 442 time(s) in 403 verse(s) in Quran in Mohsin Khan translation.

(251) And We bestowed upon him Ishaq (Isaac), and (a grandson) Ya'qub (Jacob). Each one We made righteous.

(252) We helped him against the people who denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.). Verily, they were a people given to evil. So We drowned them all.

(253) And she who guarded her chastity [Virgin Maryam (Mary)]: We breathed into (the sleeves of) her (shirt or garment) [through Our Ruh - Jibril (Gabriel)], and We made her and her son ['Îsa (Jesus)] a sign for Al-'Alamin (the mankind and jinn).

(254) Verily, those for whom the good has preceded from Us, they will be removed far therefrom (Hell) [e.g. 'Îsa (Jesus), son of Maryam (Mary); 'Uzair (Ezra)].

(255) But those who strive against Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), to frustrate them, they will be dwellers of the Hell-fire.

(256) And verily in the cattle there is indeed a lesson for you. We give you to drink (milk) of that which is in their bellies. And there are, in them, numerous (other) benefits for you, and of them you eat.

(257) Verily, in this [what We did as regards drowning of the people of Nuh (Noah)], there are indeed Ayat (proofs, evidence, lessons, signs, etc. for men to understand), for sure We are ever putting (men) to the test.

(258) Then We sent Our Messengers in succession. Every time there came to a nation their Messenger, they denied him; so We made them follow one another (to destruction), and We made them as Ahadith (the true stories for mankind to learn a lesson from them). So away with a people who believe not!

(259) Then We sent Musa (Moses) and his brother Harun‎‎ (Aaron), with Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and manifest authority,

(260) And We made the son of Maryam (Mary) and his mother as a sign, and We gave them refuge on high ground, a place of rest, security and flowing streams.