Any ideas to generate frames artificially in timelapse?

Hi,
A long term time lapse camera has gone off and missed some frames. It is not the end of the world, but what would be the best option to generate in between frames for the interval that was not shot? It is about plants in a pot reaching 80% bloom and then camera went off and then went to 90% bloom. There is a relatively small area which changed and in a kind of predictive matter so hope there is a solution!

Try a Smooth Cut.