presser vs pressor

presser

noun
  • A person, device, or agent that presses or squeezes, as 

  • A member of a press-gang, who forces (presses) others into service. 

  • A person or device that removes wrinkles, usually from clothing. 

  • A press release. 

  • A press conference or press briefing. 

pressor

noun
  • Synonym of vasopressor 

adj
  • Synonym of vasopressor 

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