show oneself vs showcase

show oneself

verb
  • Used other than figuratively or idiomatically: see show, oneself. 

  • To expose one's genitalia, especially in an inappropriate setting; to expose oneself. 

showcase

verb
  • To display, demonstrate, show, or present. 

noun
  • A case for displaying merchandise or valuable items. 

  • A setting, occasion, or medium for exhibiting something or someone, especially in an attractive or favorable aspect. 

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