Three Prophetic Time Frames

Scripture describes three prophetic time frames related to the last 7 years of this age (Daniel 9:27). The last 7 years is made up of 2 distinct periods each lasting 3½ years.
First time frame: beginning of birth pangs with turmoil in the nations (Mt. 24:4-8).
Second time frame: increased labor pangs with counterfeit world peace (first 3½ year period).
Third time frame is the hard labor pangs with the Great Tribulation (final 3½ year period).