afraid vs out on a limb

afraid

adj
  • Regretful, sorry; expressing a reluctance to face an unpleasant situation. 

  • Impressed with fear or apprehension; in fear. 

  • Worried about, feeling concern for, fearing for (someone or something). 

out on a limb

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

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