from what i have heard it does not have to be continuous.
Look at the requirement from the website. For something that is so important don't stop at just heard.yes i dont know why people want to bring others down. it doesnt have to be continuous at all.
look at the changing work landscape of this country. not many people are full time anymore. Majority working part time or contact to contract.
"at least 1 year (1,560 hours total / 30 hours per week), continuous:"
http://www.cic.gc.ca/english/immigrate/skilled/apply-who.asp