B♭ Dominant 9th :: B♭ D F A♭ C

B
F♯
D
A
3
9
B♭
♭7
3
5
9
B♭
3
5
9
♭7
3
B♭
5
♭7
9
B♭
5
♭7
⬤ ⬤
3
⬤ ⬤
C Major :: C E G

B
F♯
D
A
C
5
3
C
3
5
C
3
5
3
C
5
⬤ ⬤
⬤ ⬤