Brown-Driver-Briggs
רְבִיעִי masculine,
רְבִיעִית feminine, adjective ordinal number fourth; — masculine רְבִיעִי Genesis 2:14 29t., רְבִעִי 1 Chronicles 24:8; 1 Chronicles 26:11; plural רְבִיעִים 2 Kings 15:12, רְבִעִים 2 Kings 10:30; feminine absolute רְבִיעִית 1 Kings 6:1 3t., רְבִיעִת Leviticus 19:29, רְבִעִית 1 Kings 6:37; 6t. + 1 Kings 6:33 (see below); construct רְבִיעִית Numbers 15:5, רְבִיעִת Exodus 29:40 4t., רְבִעִית Numbers 15:4 2t.; — fourth, usually ׳הָֽר:
1. masculine Genesis 2:14; Genesis 15:16 (JE), also (especially of days, months, sons, etc.) Genesis 1:19; Exodus 28:20; Exodus 39:13; Numbers 7:30; Numbers 29:23; Joshua 19:17 (all P), Judges 19:5; Jeremiah 39:2; Jeremiah 52:6; 1 Chronicles 27:7b; 2Chron 20:26; Ezra 8:33; noun omitted 2 Samuel 3:4 = 1 Chronicles 3:2; 1 Chronicles 2:14; 1 Chronicles 3:15; 1 Chronicles 8:2; 1 Chronicles 12:10; 1 Chronicles 23:19; 1 Chronicles 24:8,23; 1 Chronicles 25:11; 1 Chronicles 26:2,4,11; 1 Chronicles 27:7a; Ezra 10:14; Daniel 11:2; that is חֹדֶשׁ Ezekiel 1:1; Zechariah 8:19; plural in בְּנֵי רְבִ(י)עִים sons of fourth (ones), i.e. to the fourth Generation, 2 Kings 10:30; 2 Kings 15:12 (compare [רִבֵּעַ], and [Old Aramaic N¢rab] בני רבע Cook107).
2. feminine of years, 1 Kings 6:1,37; 2 Kings 18:9; Jeremiah 25:1; Jeremiah 28:1; Jeremiah 36:1; Jeremiah 45:1; Jeremiah 46:2; Jeremiah 51:59; Zechariah 6:8; Leviticus 19:24 (H); מֵאֵת רְבִעִית 1 Kings 6:33, read מְזֻזֹת רְבֻעוֺת ᵐ5 ᵑ9 Th Sta Kmp Kit Benz Bur.
3 רְבִיעִית Ezekiel 48:20 four square (read possibly רְבוּעָה).
4 רְבִ(י) עִ(י)ת as noun = fourth part, construct, הַהִין ׳ר Leviticus 23:13 (H), Exodus 29:40; Numbers 15:4,5; Numbers 28:5,7,14; הִיּוֺם ׳ר Nehemiah 9:3a; so absolute (הַיּוֺם omitted) Nehemiah 9:3 b.