perambulatory vs rubbernecking

perambulatory

adj
  • Relating to perambulation. 

rubbernecking

noun
  • The act of slowing down whilst driving a vehicle, in order to see the scene of an accident. 

  • Generally, any act of observation in a manner considered unduly overt or otherwise unseemly. 

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