for the most part; he is mainly interested in butterflies
[ Syn: chiefly , chiefly , principally , principally , primarily , primarily , in the main , in the main , chiefly , chiefly , principally , principally , primarily , primarily , in the main , in the main , chiefly , chiefly , principally , principally , primarily , primarily , in the main , in the main , chiefly , chiefly , principally , principally , primarily , primarily , in the main , in the main ]