Crystal Press has received the following response from the Policy Team

In order to meet 186.227, the applicant must have been employed in an occupation for which the sc482 visa or visas were granted. Employment undertaken with any employer can count towards meeting clause 186.227 requirements as long as that employment was full-time sponsored employment, related to which the visa/s were granted and was undertaken in Australia.

See below with my emphasis

186.227 

(1)  Subject to subclause (2), during the period of 3 years immediately before the application for the visa is made, the applicant was employed in an occupation in relation to which the visa, or visas, mentioned in paragraph 186.226(1)(a), (b) or (c) were granted:

(a)  for a total period of at least 2 years (not including any periods of unpaid leave); and

(b)  on a full‑time basis, with the employment being undertaken in Australia.

(2)  If the visa, or visas, mentioned in paragraph 186.226(1)(a), (b) or (c) were granted in relation to an occupation specified in an instrument made under subregulation 2.72(13)—during the period of 3 years immediately before the application is made, the applicant was employed in the occupation for a total period of at least 2 years (not including any period of unpaid leave).

(3)  The Minister may, by legislative instrument, specify different periods of time for the purposes of subclauses (1) and (2) for persons specified in the instrument.

In short, only sponsored employment as primary applicant maybe counted towards meeting the 186 TRT Requirement