before thee. Hebrew "before thy face".
little by little: referring to all the nations of Canaan. (Exodus 23:29; Exodus 23:30). Compare Deuteronomy 9:3, "quickly", which refers to Israel and the "sons of Anak" (Deuteronomy 9:2).
Related Commentaries of Deuteronomy 7:22
Deuteronomy 7:22
22 And the LORD thy God will put out those nations before thee by little and little: thou mayest not consume them at once, lest the beasts of the field increase upon thee.