In this section, you will

Create a helper function to go from index in the vocabulary to a word

Count the number of occurences of each word $[$identify the most used word$]$

Remember that we are using term frequency for representing our word tokens. It means that every row in $x,$ contains the counts of the specific word in that document. Every row is a document. Every column is a word. You can find the total number of uses of a word by summing by row.assert type$($id$2$word$[0])==$ strhello$\_$index $=$ vectorizer$\_$tf$,$ vocabulary$\_[\text{'}$hello$\text{'}]$assert id$2$word$[$hello$\_$index$]==$ 'hello'$[]$: # YOUR CODE HEREMode: CommandLn$1,$col$1$hw$3-1-$nlp$-$basics $(1).$ipy