1. A method comprising: receiving a probability of a n-gram identifying a word; determining a number of atomic units in the n-gram; identifying a scaling weight depending on the number of atomic units in the n-gram; and applying, using one or more computers, the scaling weight to the probability of the n-gram identifying a word to determine a scaled probability of the n-gram identifying a word.
4. The method of claim 1 , where the scaled probability of the n-gram identifying a word is x 1+k(n−1) , where x is the probability of the n-gram identifying a word, n is the number of atomic units in the n-gram, and k is a constant and 0≦k≦1.