bird dog vs squint

bird dog

verb
  • To watch closely. 

  • A multiservice tactical brevity code requesting configuration of sensors. 

  • To seek out. 

noun
  • A dog, especially a pointer, used in shooting to retrieve the dead birds. 

  • A tout. 

  • A person who seeks out real estate investment opportunities in exchange for a fee. 

  • A person who tries to steal someone else's romantic partner 

  • A radar detector (for detecting police speed traps). 

  • A hyperextension exercise performed lying on the knees, with one arm and the opposite leg lifted. 

squint

verb
  • To look or glance sideways. 

  • To be not quite straight, off-centred; to deviate from a true line; to run obliquely. 

  • To turn to an oblique position; to direct obliquely. 

  • To look with, or have eyes that are turned in different directions; to suffer from strabismus. 

  • To look with the eyes partly closed, as in bright sunlight, or as a threatening expression. 

  • To have an indirect bearing, reference, or implication; to have an allusion to, or inclination towards, something. 

adj
  • Looking obliquely; having the vision distorted. 

  • askew, not level 

noun
  • An expression in which the eyes are partly closed. 

  • A quick or sideways glance. 

  • A hagioscope. 

  • A short look; a peep. 

  • The angle by which the transmission signal is offset from the normal of a phased array antenna. 

  • The look of eyes which are turned in different directions, as in strabismus. 

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