I couldn't understand much of what do you mean by data usage?
If this is in the context of license usage based on sourcetype, you can navigate to Monitoring Console -> Indexing -> License Usage -> License Usage - Previous 30 days dashboard and filter the data to display the dashboard split by "sourcetype". And since it is based on timechart, you can find the usage for different periods of time as per your need.
If this is in the context of event count based on sourcetype, you can run the following search query between specific time intervals to get the count of events for that specific sourcetype for the defined time interval
| metadata type=sourcetypes index=* splunk_server_group=dmc_group_indexer splunk_server_group="*"
| fields sourcetype, totalCount
| sort - totalCount
| search sourcetype=gshshsh
| rename sourcetype as Sourcetype, totalCount as "Event Count"
If you find the answer helpful, an upvote/karma is appreciated