attaché case vs suitcase

attaché case

noun
  • A box-style briefcase, scrunched over a hinged frame that opens into two compartments. 

suitcase

noun
  • A large (usually rectangular) piece of luggage used for carrying clothes, and sometimes suits, when travelling. 

verb
  • To smuggle in one's rectum. 

  • To trade using samples in a suitcase. 

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