The phrase "most by" can often be used to indicate the highest quantity of something. However, it's important to vary our language when expressing this idea and not overuse the same phrase. Instead, consider using synonyms like "majority of," "largest part," "great number of," "predominant," or "principle." Additionally, you could use more descriptive language to showcase the degree of dominance, such as "overwhelmingly," "dominant," or "preponderant." By utilizing a range of vocabulary to communicate this concept, you can diversify your writing and enhance its impact on the reader.