loving cup vs suction cup

loving cup

noun
  • A large cup with two or more handles, passed around for all to drink from; a ceremonial version of such a cup awarded as a trophy. 

suction cup

noun
  • A cup made of flexible material, such as rubber, that uses suction as an adhesive. 

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