inroad vs trespass

inroad

noun
  • An advance into enemy territory, an attempted invasion; an encroachment, an incursion. 

  • Often followed by in, into, or on: initial progress made toward accomplishing a goal or solving a problem. 

trespass

noun
  • An intentional interference with another's property or person. 

verb
  • To decree that a person shall be arrested for trespassing if he or she returns to someone else's land. 

  • To go too far; to put someone to inconvenience by demand or importunity; to intrude. 

  • To enter someone else's property illegally. 

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