Hello.. apologies if I'm misunderstanding you.
But on the OINP HCP website you provided, it has 2 different streams applicants can choose: Foreign or CEC.
For FSW, it specifies that the skilled work experience must be 
1 year, continuous, and in your primary NOC 
However, for CEC, it only says that the experience must be 
1 year, in TEER 1,2,3, but can be cumulative. It says nothing about the work experience being in your primary occupation.
My main query is the fact that it is not specific anywhere on the website how much work experience is needed for the tech draw. It simply says (
https://www.ontario.ca/page/oinp-tech-draws)
Tech draws
The OINP will be searching the Express Entry pool to find candidates who may:
meet the criteria of the Human Capital Priorities Stream - 
I meet the stream requirements because I have 1 year of experience in a TEER 1,2,3 
have work experience in one of the targeted National Occupational Classification (NOC) codes - 
I just started a new job in a targeted NOC, so I will be gaining work experience
Will I qualify?