1. A text locating system comprising: means for storing an acoustic description of each of a plurality of vocabulary words; means for representing a body of text having a sequence of words, said body of text being other than a list of said vocabulary words; means for receiving an acoustic description of one or more utterances to be recognized; recognition means for comparing the acoustic descriptions of the utterances to be recognized against acoustic descriptions of a recognition vocabulary comprised of one or more of said vocabulary words to select which of the words in said recognition vocabulary most probably correspond to said one or more utterances; search-string means for receiving one or more vocabulary words determined by said recognition means as corresponding to said one or more utterances and for creating a search string out of them; matching means for searching at least a portion of said body of text for a sub-sequence of one or more words matching said search string; probability altering means for altering the probability that said recognition means will select a given vocabulary word as corresponding to a given utterance as a function of the frequency of occurrence of that vocabulary word in at least a portion of said body of text.