You can apply for a multiple entry non immigrant US visa B1/B2 and if you are approved, it is typically 120 months (10 years);
As I wrote earlier, the consular officer will look at the overall picture in his/her decision to grant or reject the visa application based on ties to Canada such as a job, family etc.
As I wrote earlier, the consular officer will look at the overall picture in his/her decision to grant or reject the visa application based on ties to Canada such as a job, family etc.