prophylactic vs protection

prophylactic

noun
  • A prophylactic condom. 

  • A medicine which preserves or defends against disease; a preventive. 

  • Any device or mechanism intended to prevent harmful consequences. 

adj
  • Serving to prevent or protect against an undesired effect, especially disease or pregnancy 

protection

noun
  • A means, such as a condom, of preventing pregnancy or sexually transmitted disease. 

  • Coverage. 

  • A means of keeping or remaining safe. 

  • The process of keeping (something or someone) safe. 

  • The state of being safe. 

  • An instance of a security token associated with a resource (such as a file). 

  • Restrictions on foreign competitors which limit their ability to compete with domestic producers of goods or services. 

  • Immunity from harm, obtained by illegal payments, as bribery or extortion. 

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