Dan 7:25 And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until ***a time and times and the dividing of time***. 

Dan 12:7 And I heard the man clothed in linen, which was upon the waters of the river, when he held up his right hand and his left hand unto heaven, and sware by him that liveth for ever that it shall be for ***a time, times, and an half***; and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished. 

Rev 12:14 And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for ***a time, and times, and half a time***, from the face of the serpent. ;etc...

A few days ago, I came across Psalm 90:10, "The days of our years are ***threescore years and ten***; and if by reason of strength they be fourscore years, yet is their strength labour and sorrow; for it is soon cut off, and we fly away."

Ok, 1 score = 20 years. So, threescore and ten = 70 years. Nothing new. 

What if "time" = 1 score(20), times = 2 score(40), and half a time = 0.5 score(10)?

Is it plausible that 3.5, as well as alternative renderings(e.g. "a thousand two hundred and threescore days", "forty and two months", etc.), could symbolize the "average" human lifetime?