cui Pronoun, cui whose to whom Appox. usage (any sense): 3000 per million words Appox. usage (any sense): 3000 per million words
de Pronoun, de ▼ ▶ (informal, or, regional) Relative pronoun: who, whom, to whom. Synonyms: care Appox. usage (any sense): 880000 per million words Appox. usage (any sense): 880000 per million words