Dividends at taxed at income tax rates
[1] https://advisors.vanguard.com/VGApp/iip/advisor/csa/investme...
(It's 90 days for preferred shares.)
The corporation will have to repatriate the money and pay corporate income tax on it before they give you your dividends.
Alternatively, they could just grow that hoard of cash and let your stock appreciate after which you can sell a few shares and get capital gains rates on capital that didn't have to be double taxed.
Edit: *qualified dividends
No, ordinary dividends are taxed as income.