ejaculation vs female ejaculation

ejaculation

noun
  • A reflex in human beings and other mammals in response to sexual stimulation involving the forcible ejection from the urethra of, in males, semen; and, in females, vaginal fluid. 

  • The uttering of a short, sudden exclamation or prayer, or the exclamation or prayer uttered. 

  • The act of throwing or darting out with a sudden force and rapid flight. 

  • The act of ejecting or suddenly throwing, as a fluid from a duct or other body structure. 

female ejaculation

noun
  • The forceful expulsion of fluids from the vagina during the female orgasm, possibly originating from the Skene's gland (paraurethral gland) and/or urethra. 

How often have the words ejaculation and female ejaculation occurred in a corpus of books? (source: Google Ngram Viewer )