suspensions are for 3 months, and you can do 2 of them max, but you have to re-request it, iirc
breaking the contract would be $350 - $10/month that you have had the contract
You can suspend your line for up to 180 days but have to re suspend every 60 days
to suspend the contract both above is correct.
Some added information about terminating contract...
If you are using a feature phone
$175 - $5 a month
If you are using a smartphone
$350 - $10 a month