I struggle to understand what's the difference between Probability distribution (https://en.wikipedia.org/wiki/Probability_distribution) vs. probability mass function (https://en.wikipedia.org/wiki/Probability_mass_function) or Probability density function (https://en.wikipedia.org/wiki/Probability_density_function). Both probability distribution and lets say PMF seem to reflect probability of values of a random variable. Note that I do not ask the difference between PDF and PMF.
Consider the following example when a 4-sides dice is rolled twice. X is the sum of two throws. I calculate the probability mass function (left) and then show the result graphically (right). But it seems that it is fair to call this graph probability distribution. Isn't it?