bulwark vs patron

bulwark

noun
  • A defense or safeguard. 

  • A defensive wall or rampart. 

  • A breakwater. 

  • Any means of defence or security. 

  • The planking or plating along the sides of a nautical vessel above her gunwale that reduces the likelihood of seas washing over the gunwales and people being washed overboard. 

verb
  • To fortify something with a wall or rampart. 

  • To provide protection of defense for something. 

patron

noun
  • One who protects or supports; a defender or advocate. 

  • A guardian or intercessor; synonym of patron saint. 

  • An influential, wealthy person who supported an artist, craftsman, a scholar or a noble. 

  • A customer, as of a certain store or restaurant. 

  • A protector of a dependent, especially a master who had freed a slave but still retained some paternal rights. 

  • One who has gift and disposition of a benefice. 

  • A padrone. 

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