arvw, if you read the Application Guide (http://www.mri.gov.on.ca/repository/oinp_en_worker.pdf), in the point 2.1.2. it states:
To meet the work experience requirement, you must provide documentation demonstrating that:
• you have at least two years of cumulative paid full-time work experience, or the equivalent in paid part-time work experience, within the last five years prior to the date of application submission.
Cumulative means that your combined periods of work experience add up to a total of two years. In other words, you do not need to demonstrate that your periods of employment were back to back. There can be gaps in your employment provided that all the periods of work stated in your application add up to two years within five years of the date of application submission.
If you have:
1 year + 7 months Full-Time = 19 months FT
10 months Part-Time = 5 months FT
TOTAL: 24 months FT, that's 2 years of cumulative full-time work experience
I am pretty sure that you fulfill that requirement!
How about NOC on 2 different jobs?