intersperse (something) among (something)
To incorporate or scatter something in or throughout something else. For the kitchen backsplash, I want to intersperse some of these sparkly gray blocks among the black and white ones.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
intersperse something among something
to place something among things at random. We interspersed a few chocolate dough nuts among all the plain ones. Some chocolate ones had been interspersed among the plain ones.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.