bulwark vs coverage

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. 

coverage

noun
  • Defense. 

  • Journalism: the attention given by the press or news media about some news; the total of stories published or broadcast about a topic. 

  • The average number of reads representing a given nucleotide in the reconstructed sequence. 

  • The area covered by a mobile phone (cellphone) or other radio network. 

  • The signal strength, reception of a radio signal. 

  • The amount of space or time given to an event in newspapers or on television. 

  • An amount by which something or someone is covered. 

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