Adjusting poll time window
To adjust the timing of your poll, click on "My Polls" :
Scroll down to the 'Report Timing' section of the page and it will show you the timings of the invites for the poll, reminders and when you will receive the report of the poll.
You can change the frequency by changing the Day and Time for the poll to be sent out.
Click "Save Details" at the bottom of the page after setting the new timing.