Hanna Barbara animation frame rate
This may be useful:
https://www.illustrationhistory.org/essays/hanna-barbera-the-architects-of-saturday-morning


  For a standard Disney feature, the film would be projected at
  the standard 24 frames per second with each frame having different
  animation. Planned animation provided for fewer frames, so that
  instead of each frame having a new image, frames would be repeated two
  or three times, resulting in just twelve or eight different frames per
  second.
  
  This experimental approach is showcased in UPA’s most stylized
  cartoon, Gerald McBoing Boing, for which they won an Academy Award in
  1951. However, Hanna-Barbera adapted the technique out of necessity.