csv-thin thins down high bandwidth data by a given rate.
A new option,
--period, allows you to specify the period of output, regardless of the rate of the input data (assuming that it's at least as fast as the desired output rate).
csv-paste for a high-rate input source you can try it with:
By default it uses wall-clock time for clocking the data. Alternately, and useful with pre-captured data, you can use a time field in the data: