Your pricing strategy
should not change that frequently. Regarding the price you charge for your product/service, there are no hard & fast rules, and it will depend on the product & the market.
Some products are allowed to increase their price with CPI annually. In other cases, you may be able to increase prices because of increased costs or exchange rate changes, e.g. petrol/gas prices or air travel.
Usually, small price increases are easier because they are less likely to be noticed, as per Weber's law.