There are many synonyms that can be used in place of the phrase "on any occasion." These include "at all times," "whenever necessary," "in every circumstance," "under any circumstance," "on every occasion," and "at any time." Each of these phrases highlights the idea that something can occur at any point in time, regardless of external factors. They can be used in various contexts, from discussing the availability of a service to describing the potential for something to happen. Whatever the situation may be, using synonyms for "on any occasion" can help to convey a sense of flexibility and openness.