panty girdle vs shapewear

panty girdle

noun
  • A type of control garment for women consisting of underpants with a built-in elasticated corset. 

shapewear

noun
  • foundation garments, designed to hold a part of the body in a particular form 

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