Split the string sentence into a list of words, then create a dictionary named word_counts that contains each word and the number of times it occurs.

words count in dictionary

sentence = "The dog chased the rabbit into the forest but the rabbit was too quick."
words=[]
word_counts={}

for i in sentence.split():
     words.append(i)
for c in words:
      if c not in word_counts:
             word_counts[c] = 0
      word_counts[c] = word_counts[c] + 1    
print(word_counts)        

sentence = "The dog chased the rabbit into the forest but the rabbit was too quick."
word_counts= {}
for i in sentence.split():
if i not in word_counts:
word_counts[i]= 0
word_counts[i]+=1
print(word_counts)