protection vs surge

protection

noun
  • 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. 

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

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

surge

verb
  • To slack off a line. 

  • To experience a momentary reversal of airflow through the compressor section due to disruption of intake airflow. 

  • To accelerate forwards, particularly suddenly. 

  • To rush, flood, or increase suddenly. 

noun
  • A deployment in large numbers at short notice. 

  • The maximum amplitude of a vehicle's forward/backward oscillation. 

  • The tapered part of a windlass barrel or a capstan, upon which the cable surges, or slips. 

  • A sudden transient rush, flood or increase. 

  • A momentary reversal of the airflow through the compressor section of a jet engine due to disruption of the airflow entering the engine's air intake, accompanied by loud banging noises, emission of flame, and temporary loss of thrust. 

  • A sudden electrical spike or increase of voltage and current. 

  • The swell or heave of the sea (FM 55-501). 

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