hairdryer vs tumble dryer

hairdryer

noun
  • A small electrical appliance for drying hair, by generating a stream of hot air. 

tumble dryer

noun
  • An electrical device that dries clothes in a rotating drum which tumbles the clothes in a flow of hot air. 

How often have the words hairdryer and tumble dryer occurred in a corpus of books? (source: Google Ngram Viewer )