out on a limb vs plucky

out on a limb

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

plucky

adj
  • Having or showing pluck, courage or spirit in trying circumstances. 

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