Timelion - wildcard in metric parameters


I have a set of distinct properties, which represent latencies for various steps of an event we persist, e.g. service1-call-duration, persistence-duration, etc..

Is it possible to use wildcards in the metrics parameter of a query, something like:
.es(metric='avg:*-duration') ?

Are there any other options of doing this other than persisting each of the durations in a new entry?