in one year
Deuteronomy 7:22
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.
Joshua 15:63
As for the Jebusites the inhabitants of Jerusalem, the children of Judah could not drive them out: but the Jebusites dwell with the children of Judah at Jerusalem unto this day.
Joshua 16:10
And they drave not out the Canaanites that dwelt in Gezer: but the Canaanites dwell among the Ephraimites unto this day, and serve under tribute.
Joshua 17:12
Yet the children of Manasseh could not drive out the inhabitants of those cities; but the Canaanites would dwell in that land.
Joshua 17:13
Yet it came to pass, when the children of Israel were waxen strong, that they put the Canaanites to tribute; but did not utterly drive them out.
Judges 3:1-4
1
Now these are the nations which the LORD left, to prove Israel by them, even as many of Israel as had not known all the wars of Canaan;
2
Only that the generations of the children of Israel might know, to teach them war, at the least such as before knew nothing thereof;
3
Namely, five lords of the Philistines, and all the Canaanites, and the Sidonians, and the Hivites that dwelt in mount Lebanon, from mount Baalhermon unto the entering in of Hamath.
4
And they were to prove Israel by them, to know whether they would hearken unto the commandments of the LORD, which he commanded their fathers by the hand of Moses.