builder's mug vs suction cup

builder's mug

noun
  • A large ceramic mug for hot drinks. 

  • A unit of volumetric measure equivalent to the typical builder's mug, around 1/2-pint (10 oz.; 300 cc; 300 mL; 30 cL; 1 cup) 

suction cup

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

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