Search the Number of occurrences of the particular words in data using Pandas. I wanna Search how many times "bad"  and "good" words are repeated in the data frame and visualize  this with histogram.
Jurgy's answer should work. However, based on comments above, you can simply do like this,

df['yourcolumn_name_good_bad'].value_counts().plot(kind='bar')


Otherwise, if you want to use seaborn library and create a plot follow this.