14. The speech recognition system of claim 12 , wherein the threshold is from a table of thresholds, the thresholds corresponding to a plurality of utterance types.
12. A speech recognition system, comprising: a processor; and a tuning engine comprising instructions that are executable by the processor to tune a speech module with respect to a particular type of utterance in response to the processor determining that a frequency of occurrence of the particular type of utterance satisfies a threshold.