bean flicking vs self-pleasing

bean flicking

noun

  • Manually stimulating one's clitoris; female masturbation. 

self-pleasing

noun

  • masturbation 

adj

  • That pleases oneself; given over only to one's own pleasure. 

How often have the words bean flicking and self-pleasing occurred in a corpus of books? (source: Google Ngram Viewer )