value count in python

col-name.value_count()

Format: string.count(sub, start= 0,end=len(string))
string =  "Add Grepper Answer"
print(string.count('e')
>>> 3

# string in which occurrence will be checked 
string = "geeks for geeks" 
  
# counts the number of times substring occurs in  
# the given string and returns an integer 
print(string.count("geeks")) 

it counts the number of elements in the list or in the string(words)

from collections import Counter
values=np.ones(10)
Counter(values)