accompanied vs by oneself

accompanied

adj
  • Having accompaniment; being part of a group of at least two. 

by oneself

prep
  • Alone; without assistance or help from others. 

  • Alone, without another's immediate company 

  • Used other than figuratively or idiomatically: see by, oneself. 

adv
  • without outside assistance 

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