OSM SQLite Experiment: Frequency of key building (elem type r)

These queries show the top frequencies of keys for key (element type )

1 yes 643,610
2 house 99,500
3 apartments 95,420
4 residential 37,353
5 school 36,185
6 industrial 13,352
7 commercial 10,359
8 hospital 8,239
9 university 7,693
10 roof 7,317
11 office 6,799
12 retail 6,541
13 detached 5,775
14 terrace 5,152
15 farm 4,639
16 public 4,135
17 church 3,798
18 garages 3,651
19 hotel 2,715
20 garage 2,621
21 stadium 2,420
22 civic 2,338
23 farm_auxiliary 2,190
24 kindergarten 2,166
25 dormitory 1,995
26 service 1,750
27 college 1,713
28 semidetached_house 1,599
29 hut 1,570
30 construction 1,377
31 warehouse 1,346
32 ruins 1,295
33 tulou 944
34 government 750
35 train_station 717
36 greenhouse 663
37 monastery 640
38 parking 598
39 shed 553
40 transportation 516
41 castle 479
42 mosque 458
43 barn 438
44 temple 326
45 grandstand 295
46 hangar 265
47 chapel 233
48 commercial;residential 233
49 roof;yes 214
50 stall 194

:-)