Value of Repetition, Part 14 (Rhythm Sequence)

Listening to Chorus 2 of George Harmonica Smith's "Juicy Harmonica" notice that the first and second line use the same rhythm. Though the notes are different, the rhythm remains the same. This is a rhythm sequence. He changes on the last line (last four bars). Focusing on pitches only, you would call this an A B C Chorus Form. Taking into account the rhythm, it's clearly an A A1 B Chorus Form (A, A variation 1, B Chorus Form).

Here's what he plays using TAB. I placed the pickup to each line in parenthesis so that you can see the main meat of the line he's playing.

Line 1: (3+) 3 4+ 4' 4
Line 2: (4 4') 4+ 5+ 6+ 4