SN4 ""

No	Pattern	Freq
1	date back [prep] the [adj] [noun]	96
2	date back [prep] the [adj] [noun]	96
3	date back [prep] the [adj] [noun]	96
4	date back to the [adj] [noun]	95
5	date back to the [adj] [noun]	95
6	date back [prep] the [adj] [noun sg]	81
7	date back [prep] the [num ord] [noun]	69
8	date back [prep] the [adj] century	66
9	date back [prep] the [adj] century	66
10	dating back [prep] the [adj] [noun]	46
11	dates back [prep] the [adj] [noun]	34
12	date back [prep] the [adj] [noun]	27
13	date back [prep] the [adj] [noun pl]	13
14	date back [prep] the [adj] [noun]	11
15	date back [prep] the middle [noun]	7
16	date back [prep] the middle [noun]	7
17	date back [prep] the last [noun]	6
18	date back [prep] the [adj] age	6
19	date back [prep] the 13th [noun]	6
20	date back [prep] the last [noun]	6
21	date back [prep] the [adj] ages	6
22	date back [prep] the 13th [noun]	6
23	date back [prep] the 12th [noun]	5
24	date back [prep] the 14th [noun]	5
25	date back [prep] the 12th [noun]	5
26	date back [prep] the 14th [noun]	5