nostril vs proboscis

nostril

noun
  • Either of the two orifices located on the nose (or on the beak of a bird); used as a passage for air and other gases to travel the nasal passages. 

proboscis

noun
  • A large or lengthy human nose. 

  • The trunk of an elephant. 

  • The tubular feeding and sucking organ of certain invertebrates like insects, worms and molluscs. 

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