D Dominant 7th (♭5) :: D F♯ A♭ C

F
C
G
D
♭7
D
3
♭5
D
♭5
3
♭7
3
♭5
♭7
D
♭5
D
♭7
3
⬤ ⬤
♭7
D
⬤ ⬤
C Major :: C E G

F
C
G
D
C
5
5
3
3
C
5
C
5
3
C
3
⬤ ⬤
C
5
⬤ ⬤