Usually 1-3 days, in some cases about 1 week.
For more details, please refer to "How long does it take to review my submission?" in FAQ at https://www.finmail.com
it takes about two working days for a task to get rewarded. This is to my experience. And after submitting a particular article, you could go ahead to work on the others. you could submit all at once and it is rewarded same time or in different days or time. NOTE: finmail doesn't judge on more than two articles of same task submitted all in one day. it could be two different task submitted not two same task. For example, Local cuisine. if you writing on this task, and you submit, you can only submit a task related to local cuisine on another day, not on desame day. if you do submit two articles of same task on one day, just one will be looked-at. I HOPE THIS HELPS YOU.