I always struggled connecting the dots with the time frame. Not so much when the 2 witnesses get here, but the total tribulation time.
Here are some of my thoughts: 
We know Christ shortened the tribulation.
I would also assume we would agree that the trumps take place during the tribulation and are actions that take some actual time. Especially the 3 which are woe trumps.
If the trumps are encompassed in the tribulation, how long does the first 4 take?
We know the 1st woe is 5 months long and is initiated with the 5th trump.
We are told specifically that at the end of the 5th and 6th trump that the 1st and 2nd woe are over making them independent of each other.
How long did the 2nd woe take? When thinking about the length of time for the tribulation, to me, it appears that if the 1st woe is 5 months, then the total time has to be longer than 5 months.
In thinking about the shortening, when was it done?
We know from Daniel it is 7 years long total. Christ tells us that He shortened it in the gospels. Johnâs version has the same time frame as Daniel. Why would Christ have John write the long version if He already shortened it?
Could He have shortened it before Daniel was written? If not, and it was after Daniel, but before John, why duplicate the time knowing it is not valid anymore and how do we fit the other trumps into the 5 months?
Also, if the vials are after the trumps, this would take time also. Or do they run concurrently with some of the trumps. We know they do not start to be poured till the mark of the beast is on man and the image is set up. Vial #1.
Not stating it either way, just saying my dots donât form a straight line. 
Of course, we know REV 11:3 says 1260 days and is marked by half and second half being the Great Tribulation REV 13:5. Total Seven/7 years. Of course, seven is âcompletion, perfection, restâ for God.
