dryer vs hair dryer

dryer

noun
  • An electric hair dryer. 

  • A catalyst used to promote the drying of paints and varnishes by oxidative crosslinking. 

  • A household appliance that removes the water from clothing by accelerating evaporation, usually though heat and a tumbling motion. 

  • Any other device or facility, household or industrial, designed to remove water or humidity. 

  • One who, or that which, dries; a desiccative. 

hair dryer

noun
  • An electric device for drying hair by blowing hot air on it; a blow-dryer. 

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