not to be sneezed at vs princely

not to be sneezed at

princely

adv

  • In the manner of a royal prince's conduct. 

adj

  • Relating to a prince; regal; royal. 

  • Befitting a prince; grand; lavish or opulent. 

How often have the words not to be sneezed at and princely occurred in a corpus of books? (source: Google Ngram Viewer )