out on a limb vs unhealthy

out on a limb

phrase
  • In a risky, precarious, daring, or uncompromising position, especially one outside of the mainstream; vulnerable. 

unhealthy

adj
  • characterized by, or conducive to poor health 

  • characterized by disturbed mental health 

  • tending to corrupt 

  • sick or ill 

How often have the words out on a limb and unhealthy occurred in a corpus of books? (source: Google Ngram Viewer )