The Cherries had the lead through an own goal from Vitaly Janelt own goal, before the visitors stormed back through Yoane Wissa and Christian Norgaard.
Frank later said, “It was a good first half, I was very pleased with the way we performed; we scored the own goal and Evanilson had a chance but, besides that, we were okay.
“It was an open game, where a lot of situations could happen, and we scored a great goal from a corner. We then had six top moments, where we should have got something from it.
“Second half, Bournemouth were better in the opening 10 minutes, but we grew into it and scored a great, ugly goal from a long throw!
“From then on, we were in control, we defended well, and we saw the game out. It was an even game that we edged - we haven’t done that at times this season, so I’m really happy.”