customer vs geezer

customer

noun
  • A person, especially one engaging in some sort of interaction with others. 

  • A native official who exacted customs duties. 

  • A patron, a client; one who purchases or receives a product or service from a business or merchant, or intends to do so. 

geezer

noun
  • Someone affable but morally dubious; a wide boy. 

  • An old person, usually a male, typically a cranky old man. 

  • Term of address for a male. 

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