If you are looking for a comprehensive German frequency dictionary, ensure it is based on modern "corpora" (databases of language) so you are learning contemporary German rather than outdated phrases. Happy learning—or as the Germans say, Viel Erfolg!
Essential Verbs: High-frequency verbs like "sein" (to be), "haben" (to have), and "werden" (to become) are the engines of your sentences. If you are looking for a comprehensive German