Working holiday visa

What is the connection between your stay in Canada and the 90 day max stay in the US? What is this 90 day stay in the US and how is this connected with your 3 month stay in Canada? This does not make sense, can you please clarify?

With USA there's an issue with 90 day maximum stay limit so it seems it might not be possible to go there as I've been in canada for almost three months.
 
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