Values for "Poll duration" should be made regular

Here's an interesting little oddity. In Drupal 6, the options for "Poll duration" were: 1/2/4 days; 1/2/4/8/16 weeks; 1 year.

In Drupal 7, the options make less sense IMHO, as: 1/2/4 days; 1/2/4 weeks; 1 month and 3 weeks (!); 3 months and 3 weeks (?!?); and 1 year.

I'd like to change Drupal 7's options to the following: 1/2/3/4/5/6 days; 1/2/3/4 weeks; 1/2/3/6/9 months; 1 year.

I'm assuming that this is a trivially easy fix to make, code-wise, which is perfect for me: I'm actually not a coder, and would like this experience to learn how to contribute code to Drupal.

(Of course I could be wrong about how easy this fix is: For example, I can't find the text string "week" in the poll module at all! Odd.)