arouse vs sex up

arouse

verb
  • To sexually stimulate. 

  • To stimulate or induce (feelings). 

  • To cause an erection of the penis or other physical signs of sexual arousal, such as fluid secretion. 

  • To wake from sleep or stupor; to rouse. 

sex up

verb
  • To arouse somebody sexually 

  • To enhance in terms of fashionable appeal. 

  • To sensationalize. 

  • To make more sexually attractive. 

  • To take part in sexual acts with. 

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