as per FSW the minimum requirement for work experience is as follows :
if your application is eligible to be processed, we will then assess it to see if your work experience, as described above, is valid.
Your work experience must be:
at least one year (1560 hours), full-time or an equal amount in part-time,
paid work (volunteer work, unpaid internships, etc. do not count),
in the same occupation, and
within the last 10 years,
at skill type 0, or skill levels A or B of the 2011 edition of the Canadian National Occupational Classification (NOC)
You must show that you did the duties set out in the lead statement of the occupational description in the NOC, including all the essential duties and most of the main duties listed. If you do not show that your experience meets the description in the NOC, we will refuse your application.
in your case you work for 40 hours/week. you can calculate number of weeks and if it comes out to be more than 1560 *2 then you have 2 years of experience. but then you have to prove that you work for 40 hours/week by giving referral letter or experience letter. hope this helps