Enable possibility to schedule several times an hour

[dschibster]

This requires more than one Scheduled Job to be able to do "normally". The other option would be to try and reschedule in the finish() section of a batch job to run after one of the jobs is done running.

[dschibster]

New idea: consuming multiple crontriggers is still going to be the best way about it, however we don't need multiple schedule objects for it ideally.
create a custom object SubHourlyJob which is going to be a child of the schedule object, which will then contain all of the cron expressions and cron trigger ids.

need to watch out for retreival of parent in the schedule when doing so, might require another SOQL query.