Groups of chords can be repeated several times

In that case, the group (or groups) of chords will be enclosed with ( and xN), with N being the number of times this group should be repeated.

Let’s say the chords for a given section are: (Am7 Am7 D D x2) - Bm Bm Em C - G D7 G G-D7

Let’s take a look at another example: (F F C C - Dm Dm F C x3) - F F C C - Dm Dm A A