한국인은 캐나다에 무비자로 6개월간 체류할 수 있는데
입국시마다 6개월로 알고 있습니다
미국처럼 입국시 체류기간을 정해 준다면 여권에 표시해 줍니다
지인이 캐나다 딸집에서 몇개월,, 미국 아들 집에서 몇개월
다시 캐나다 딸집에서 사시곤 했습니다

<a href=http://www.cic.gc.ca/english/information/faq/visit/visit-faq01.asp
target=_blank>http://www.cic.gc.ca/english/information/faq/visit/visit-faq01.asp
</a>
(내용이 길지만 질문에 대한 답입니다.)

Single-entry visa
A single-entry visa allows you to enter Canada once.

When you arrive at the point of entry in Canada, an officer of the Canada Border Services Agency will make sure you meet the requirements to enter Canada.

The officer will authorize your stay by placing a stamp in your passport and/or issuing an additional document.

If there is no stamp, a handwritten date or document in your passport, your temporary resident status will expire six months from the day you arrived in Canada.

If you were given a visitor record, student or work permit, the expiry date is marked on the document.

If you leave Canada during your authorized stay, you must get a new visitor visa to re-enter Canada.

There are two exceptions: you can visit the United States or Saint-Pierre et Miquelon and return to Canada without getting a new visa, as long as you:

&#8226;return within the initial period authorized by the immigration officer or
&#8226;have a valid visitor record, work permit, study permit, or a temporary resident permit (authorizing re-entry) and return within the initial period authorized by the officer.
Multiple-entry visa
A multiple-entry visa allows you to enter Canada several times during the period while your visa is valid. A multiple-entry visa is valid for a maximum of five years or one month prior to the expiry date on the passport/re-entry visa, whichever is earlier.

If a multiple-entry visa is approved, it will allow you to enter and leave Canada repeatedly during the validity period of the visa. You must arrive in Canada on or before the expiry date on your visa. You cannot get a multiple-entry visa for a period that ends after the expiry date of your passport. If your passport will expire soon, you should renew it before you apply for your visa.

If you want to visit several other countries or return to your own country before coming back to Canada, you will need a multiple-entry visa. If you plan to visit Canada frequently, a multiple-entry visa is recommended.