Using the number of times f is paired with some target phrase e i , count(f, e i ), relative frequency estimation can be used to compute the probability of translation e i given source phrase f : This value, together with other estimates of how appropriate a translation pair (f, e i ) is, are recorded in a phrase table, which typically discards all contextual information.
8 the translation distribution of some phrase is globally estimated from a training corpus independently of the actual context of that phrase.