The parrot knew 3 phrases when Georgina bought it, so it has learned 17 - 3 = <<17-3=14>>14 phrases from her.
She has been teaching it 2 phrases a week, so she has had it 14 / 2 = <<14/2=7>>7 weeks.
There are 7 days in a week, so Georgina has had the parrot for 7 * 7 = <<7*7=49>>49 days.
#### 49