dip into vs play with

dip into

verb
  • Used other than figuratively or idiomatically: dip into. 

  • To spend some of a source of money (such as one's savings). 

  • To read, examine or engage in (something) in a cursory or casual manner. 

play with

verb
  • Used other than figuratively or idiomatically: play with. 

  • To trick. 

  • To sexually stimulate a person or a person's erogenous zone. 

  • To fiddle with; make small adjustments to, for example to something mechanical in order to improve its performance. 

How often have the words dip into and play with occurred in a corpus of books? (source: Google Ngram Viewer )