Spurs now sit third on the Premier League table after Sunday night's impressive win at Everton.
Asked about his team's potential, Frank was bullish, stating: "I think we are in the beginning of building something. I'm very happy with a lot of things.
"As I said, the defensive side of it, mentality, set-pieces, but I think there's a bit we need to work on, especially offensively, to be more free-floating still. And for me, it's a long season ahead. I'm very happy going away from home after two away games in the Champions League.
"That's a big part of it. But to continue performing day in, day out is a challenge, which we embrace and want to do."
However, when asked if they're a title contender this season, the Dane responded: "No. That, I think, is probably a few teams that are ahead of us. I think it's fair to say that. I'm only thinking one game at a time, and let's see where we are in April."