How long does it take to the US Consulate issue an interview date?

IM A LIVE IN CAREGIVER HERE IN CANADA FOR 19 MOS NOW AND IM MARRIED TO A US CITIZEN, MY HUSBAND APPLIED MY PETITION (K3 VISA) AND IM JUST WAITING FOR AN INTERVIEW MY APPLICATION WOULD BE ONE YR ON JULY 26. HOW LONG WILL THE US EMBASSY IN MONTREAL WILL ISSUE A INTERVIEW DATE? I SUBMIT THE CHECKLIST LAST MARCH OF 2007..|||i been waiting 6 months