I think I'm gonna need to COUNT how many Mokou pics compose this pool one of these days. I'm almost certain the frequency meets a standard of at least one Mokou pic per page of 24. It's too bad I can't search both a pool AND a tag at the same time.

She appears 163 times. (Search "Fujiwara_no_mokou pool:badass)

MemphisMastermind said:
She appears 163 times. (Search "Fujiwara_no_mokou pool:badass)

Confirmed!
That's about 6%, about 1.5 Mokou posts per page of badass...holy crap my hypothesis was right! I want to check other characters/series now!

Of other franchises/characters outside of Touhou:

Pokémon: 151
=> Red: 40
=> Pikachu: 32
TTGL: 81 (that's a pity)
=> Simon: 32
=> Kamina: 23
=> Yoko: 9 :P
=> Nia: 12
=> Giga Drill Breaker: 2 out of 13 labelled as such... SHAME ON YOU, DANBOORU!!!! (Put's all of them into the pool immediately!) Now it's 11!
=> Gurren Lagann: 12
Fate stay/night: 71
Final Fantasy: 57
Santa Claus (lol, yeah): 13
One Piece: 39 (WHAT!?)
Black Rock Shooter: 28 show, but I know for a fact one of them actually isn't because it's just a reaper, so 27 (but, still... WHAT!?)
Berserk: 16 (deserves more...)
Hokuto no Ken: 9 (BIG FLAT WHAT!?)
Jojo's Bizarre Adventure: 27 (I'll stoop saying "what!?" because this is a waste of space...)
Puella Magi Madoka Magica: 45 (seriously, it only took a single season that isn't even over yet to get this many here...)
Devil May Cry: 20
Street Fighter: 26
Code Geass: 23
Gundam: 23
Nintendo: 107 (inconsistent tagging on pokémon posts is evident; if all pokémon posts are included, we'd likely have at least 200)
=> Mario: 28
=> LoZ: 22
=> Metroid: 14
=> Kirby: 6
=> Mother: 7
Dragonball: 33
Vocaloids: 31
Touhou as a whole: 1,135 (Guess it's obvious what this place is really here for...)
Mahou Shoujo Lyrical Nanoha: a despicable 17
To Aru Whatever-it-may-be: 34

Total posts in badass pool to date: 2652. Almost half of the stuff is Touhou.

Of Touhou:

Marisa: 94
Youmu: 94
Remilia: 107
Flandre: 69 (interesting...not as much as Remilia...)
Reimu: 111
Sakuya: 123 (w00t!)
Cirno: 67
Reisen: 42
Meiling: 118
Kanako: 41
Utsuho: 100
Momiji: 39
Alice: 64
Yuugi: 44
(Yuuka, the Yakumo's, Mima, Unzan, Mannosuke, etc. were searched but found to have two pages or less of material, so I don't count them, though I bet I forgot at least one who has a bit more)

None of the other Touhou characters surpass Mokou by posts unless I epic failed and forgot somebody. That might be our bias in picking and choosing since she's a popular character for it, but hey, she's my favorite character for it too.