convoy vs mobilise

convoy

verb
  • To travel under convoy. 

  • To escort a group of vehicles, and provide protection. 

noun
  • The act of convoying; protection. 

  • A group of vehicles travelling together for safety, especially one with an escort. 

  • One or more merchant ships sailing in company to the same general destination under the protection of naval vessels. 

mobilise

verb
  • To assemble troops and their equipment in a coordinated fashion so as to be ready for war. 

  • To make something mobile. 

  • To become made ready for war. 

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