precedence vs right of way

precedence

noun
  • The state of preceding in importance or priority. 

  • Precedent. 

right of way

noun
  • The priority granted to the first person to properly execute an attack. 

  • A legal easement granted for the construction of a roadway, railway, power line, or other utilities. 

  • A legal right of passage over another's land or pathways. 

  • The right to proceed first in traffic, on land, on water or in the air. Also in metaphorical senses. 

  • Land on which a right of way exists. 

  • The area modified for passage of a railway; often specifically the railbed and tracks. 

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