Crime as per the Criminal Code of Canada is a federal issue in Canada.
For summary offences, the SOL is 6 months.
For indictable offences, there is no SOL.
That means that if an offence is a summary one, the Crown only has 6 months to file charges against you.
Examples of some crimes:
Sexual assault is an indictable offence. Therefore, no SOL.
For Fraud…
It depends on the type of fraud, but it looks like Fraud is an indictable offence, meaning there is no SOL.
Take a look here for a complete copy of the Criminal Code of Canada:
Criminal Code, [R.S.C. 1985, c. C-46]