public bool InsertNewUnknownWordIfDoesntExist(WordPair newUnknownWordCandidate)
{
bool unknownWordAdded = false;
bool unknownWordAlreadyExist = _wordsRepository.CheckIfUnknownWordAlreadyExist(newUnknownWordCandidate.Id);
if (!unknownWordAlreadyExist)
{
unknownWordAdded = _wordsRepository.AddNewUnknownWord(newUnknownWordCandidate.Id);
}
return(unknownWordAdded);
}