// DeleteWord removes a word from dictionary
func (seg *Segmenter) DeleteWord(word string) {
seg.dict.AddToken(dictionary.NewToken(word, 0.0, ""))
}
// AddWord adds a new word with frequency to dictionary
func (seg *Segmenter) AddWord(word string, frequency float64) {
seg.dict.AddToken(dictionary.NewToken(word, frequency, ""))
}