There are two instances of the woman being nourished for 3-1/2 years:
Then the woman fled into the wilderness where she had a place prepared by God, so that there she would be
nourished for one thousand two hundred and sixty days. (Rev 12:6)
But the two wings of the great eagle were given to the woman, so that she could fly into the wilderness
to her place, where she was nourished for a time and times and half a time, from the presence of the serpent. And the serpent poured
water like a river out of his mouth after the woman, so that he might cause her to be swept away with the flood. But the earth helped
the woman, and the earth opened its mouth and drank up the river which the dragon poured out of his mouth.
(Rev 12:14-16).
This restatement is a Hebrew literary style in which the essential elements of an account are repeated with some
variation and introduces more specific information to emphasize or focus on the relevant elements of the account. God used this same
approach when He informed Moses about Creation especially the creation of man
(Gen 1:1-31; 2:4-25).