How to add a repeatable job with a specific start time or delay?

[Coastis]

I wish to add a new repeatable job {every:10000} set to start at a specific time in the future, how do i do this?

e.g. i'd want to stagger multiple jobs start time 0.1 seconds apart, so i can't use the cron-parser. I see there is the offset property in repeatable options, but it seems undocumented?