Ahead of their trip to Newcastle on Tuesday night, Spurs now sit 12th on the Premier League table.
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Defeat to Fulham on Saturday means Spurs haven't won at home since the opening game of the season.
Asked if he believes the owners still support him, Frank replied: "Yeah, I'm very confident.
"It seems like they're good guys, intelligent people, know how to run businesses and learning about football.
"I think when we're dealing with intelligent people, they can see every successful dynasty and every successful club has taken time."