11. Everywhere but the United States this kind of leap-frogging is the rule, not the exception. 12. The team were chased back to their rendezvous point by Angolan troops leap-frogging ahead by helicopters. 13. This frequency frogging allowed equivalent four-wire operation on a single cable pair in two-wire operation. 14. Allied forces were " leap-frogging " around Japanese strongholds in an attempt to isolate and neutralize them. 15. "The only thing they don't have, " he said, " is frogging . 16. Where many frogs are repeated beyond any reasonable needs for fastening, this purely decorative form is termed'frogging '. 17. The loss, however, prevented the Mariners from leap-frogging the Texas Rangers into first place in the AL West. 18. The German trenches had been severely damaged by the British bombardment, the attackers lost direction and leap-frogging broke down. 19. The Yankees, Red Sox, and Baltimore Orioles would keep leap frogging each other the entire year during the division race. 20. Leap-frogging ABC into third place this fall is Fox, which started off with a bang thanks to the World Series.