Example 8. The fifty most frequent chords in the major (left-hand side) and minor (right-hand side) modes in the Couperin corpus. Chords in red appear in both the ascending and the descending variants of the RoO; chords in green appear only in the ascending variant, while chords in blue appear only in the descending version.

  Major Minor
  Unigram Occurrences Proportion Unigram Occurrences Proportion
rank            
1 I 906 21.89 % i 761 17.96 %
2 V 615 14.86 % V 560 13.21 %
3 I6 416 10.05 % i6 394 9.3 %
4 V65 232 5.61 % V65 238 5.62 %
5 V7 228 5.51 % ii%65 230 5.43 %
6 IV 165 3.99 % V7 185 4.37 %
7 ii65 159 3.84 % V43 172 4.06 %
8 V43 131 3.17 % ii%43 128 3.02 %
9 vi 122 2.95 % iv 112 2.64 %
10 V6 117 2.83 % V2 98 2.31 %
11 ii 89 2.15 % iv6 69 1.63 %
12 IV6 83 2.01 % i64 69 1.63 %
13 V(4) 81 1.96 % I 59 1.39 %
14 V2 79 1.91 % VI 57 1.34 %
15 ii7 52 1.26 % V(4) 49 1.16 %
16 ii6 41 0.99 % IV 47 1.11 %
17 V(64) 40 0.97 % VIM7 47 1.11 %
18 I64 34 0.82 % V65/iv 45 1.06 %
19 vi7 33 0.8 % v6 43 1.01 %
20 V43/V 32 0.77 % V6 37 0.87 %
21 ii43 30 0.72 % ii%7 34 0.8 %
22 vi6 28 0.68 % iio 33 0.78 %
23 V65/V 28 0.68 % III 32 0.76 %
24 iii6 24 0.58 % V(64) 29 0.68 %
25 IVM7 22 0.53 % iv7 26 0.61 %
26 V7/IV 19 0.46 % III+6 26 0.61 %
27 IV64 18 0.43 % V/iv 23 0.54 %
28 V7/V 15 0.36 % v 23 0.54 %
29 viio6 14 0.34 % VII 20 0.47 %
30 I(4) 14 0.34 % ii 19 0.45 %
31 V65/IV 14 0.34 % IV6 19 0.45 %
32 V/V 13 0.31 % #vi%7 17 0.4 %
33 iii7 12 0.29 % ii65 17 0.4 %
34 iii 10 0.24 % ii6 17 0.4 %
35 IVM7(9) 10 0.24 % III6 16 0.38 %
36 V2/IV 9 0.22 % iv7(9) 15 0.35 %
37 ii(4) 9 0.22 % V65/III 15 0.35 %
38 vii%7 9 0.22 % #viio6 13 0.31 %
39 v6 9 0.22 % III+M7(9) 13 0.31 %
40 ii2 8 0.19 % #viio65 13 0.31 %
41 IM7 8 0.19 % ii7 13 0.31 %
42 V6/V 7 0.17 % V7/iv 12 0.28 %
43 IV6(2) 6 0.14 % IV7 12 0.28 %
44 IV(9) 6 0.14 % ii%2 11 0.26 %
45 I(9) 6 0.14 % iio6 11 0.26 %
46 IV65 5 0.12 % V6/iv 11 0.26 %
47 IVM2 5 0.12 % i(4) 11 0.26 %
48 I6(2) 4 0.1 % V2/iv 11 0.26 %
49 V65/ii 4 0.1 % IV7(9) 10 0.24 %
50 IM2 4 0.1 % iv64 9 0.21 %