Dividends are normally paid twice a year but they may be paid four times a year or, more rarely, once a year.
Frequency of payment is not particularly important in itself as long as the company maintains a regular pattern. If you want dividends to live on, then companies paying four times a year give you a smoother flow of income.
However, finding companies making steady, reliable profits is more important than looking for ones that make more frequent payouts.
This is extremely rare. A company making just one annual payment is probably very small and is trying to save money by reducing administrative costs. You should be more cautious of such a company ...