at war vs battling

at war

prep
  • (typically with with or against) Vigorously opposed (to); in strong conflict (with). 

  • Fighting in a war. 

battling

adj
  • Fertile. 

  • Nourishing; fattening. 

noun
  • A growing fat, or the process of causing to grow fat; a fattening. 

  • That which nourishes or fattens, as food, or feed for animals, or manure for soil. 

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