microwave oven vs pressure cooker

microwave oven

noun
  • An oven that uses microwave energy to heat food or other items placed within it. 

pressure cooker

noun
  • A sealed cooking vessel that allows cooking in greater than atmospheric pressure and at a temperature above the boiling point of water. 

  • A stressful situation that is liable to erupt. 

How often have the words microwave oven and pressure cooker occurred in a corpus of books? (source: Google Ngram Viewer )