Mapping a series of Dates to an array of Numbers

[J-Burns]

Hello. Got a problem here.

Ive got a set of points tht id be plotting. Those points would contain
the date on which the work was done against its frequency. Supposedly
if i did something on the 28th of March one of the points would be
(28, respective freq). The next time i did my work on the 1st of
April. So my next point would (1,freq).

Now how could i map all the dates to another array so that when im
plotting them i can plot the points as (day 1, freq), (day2,freq),
(day4 , freq)  and so on rather than having points like (28, freq),
(29,freq), (1,freq) and blah blah blah.

Id be needing some help on how to use the time class in python as
well. Thnx