Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
insertion [ɪnˈsəːʃən] n (in book, file) вста́вка#; (of needle) введе́ние; (of peg) вбива́ние
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.