slog vs toil

slog

verb
  • To work slowly and deliberately at a tedious task. 

  • To strike something with a heavy blow, especially a ball with a bat. 

  • To walk slowly, encountering resistance. 

noun
  • A long, tedious walk, or session of work. 

  • An aggressive shot played with little skill. 

toil

verb
  • To work (something); often with out. 

  • To struggle. 

  • To labour; work. 

  • To weary through excessive labour. 

noun
  • Trouble, strife. 

  • Labour, work, especially of a grueling nature. 

  • A net or snare; any thread, web, or string spread for taking prey. 

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