G1501
εἴκοσι
twenty
εἴκοσι (never -ιν in WH, cf. Bl., §5, 3, and note), indecl., οἱ, αἱ, τά, twenty: Luk.14:31, Jhn.6:19, Act.1:15 27:28, 1Co.10:8, Rev.4:4, 10 5:8 11:16 19:4.† (AS)
The KJV translates G1501 in the following manner:
twenty (24x), four (4x)
Full Thayer's lexicon entry
εἴκοσι — eíkosi
εἴκοσι (or εἴκοσιν; Tdf. uses εἴκοσι ten times before a consonant, and says εἴκοσι "etiam ante vocalem fere semper in manuscripts antiquiss." Proleg., p. 98; WH everywhere εἴκοσι. cf. their Appendix, p. 148; Buttmann, 9), οἱ, αἱ, τά, twenty: Luk 14:31; Act 1:15, etc. (From Homer down.)
11 occurrences
Luke (1), John (1), Acts (2), I Corinthians (1), Revelation of John (6)