disturbance vs interloping

disturbance

noun
  • The act of disturbing, being disturbed. 

  • A noisy commotion that causes a hubbub or interruption. 

  • Something that disturbs. 

  • An interruption of that which is normal or regular. 

  • A serious mental imbalance or illness. 

interloping

noun
  • An act of intrusion or encroachment. 

  • Illegal Indian trade within the area over which the Hudson's Bay Company held a trade monopoly. 

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