Figure 1: this pattern is very useful to "fill in" spaces at 
the singer's pause or at the end of a "cadenza". You 
can also feel it as 5 bars of a 3/16 time signature 
(Figure 2).

Musical example shows the pattern apllied to the end 
of a section, after 2 bars of a basic samba pattern.

To play the bass line on the chord Db6/9 you must 
hold the notes Ab and Db at the same time. Either use 
the "thumb over" technique or the left hand fingering 
4-1-1-3-2 (from top to bottom) or play the Ab and Db 
notes by pressing your second 
finger (left hand) in between the 5-th and 6-th strings.