The phrase "most annually" can be replaced with a number of synonyms to provide variety and clarity in writing. Some of these synonyms include "yearly," "per annum," "each year," "annually," "once a year," and "on a yearly basis." These phrases all express the same meaning and can be used interchangeably to convey a regular occurrence each year. The choice of which synonym to use may depend on the tone or style of the writing, as well as the intended audience. Overall, using synonyms for "most annually" can enhance the clarity and flow of a written piece.