We look at the division of 361622 by 91 
The aim is to understand the frequency of 91 in 361622.

Moving on to step 1:
91 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (6) from the dividend and append it to 3, then repeat: 36 / 91

On to step 2:
The number 91 fits into 36 0 times, leaving a remainder of 36.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 36 leaves us with 36.
Fetch the next digit (1) from the dividend, attach it to 36 and continue: 361 / 91

On to step 3:
91 goes into 361 3 times with a remainder of 88.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 273 from 361 to get 88.
Append the next digit (6) from the dividend to 88 and continue with: 886 / 91

Moving on to step 4:
When dividing 886 by 91, we get 9 with a remainder of 67.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we take 819 away from 886, we end up with 67.
Append the next digit (2) from the dividend to 67 and continue with: 672 / 91

Step 5:
If we divide 672 by 91, we get 7 and a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 397.0
If we subtract 637 from 672, we get 35.
Take the next digit (2) from the dividend and append it to 35, then repeat: 352 / 91

Moving on to step 6:
The number 91 fits into 352 3 times, leaving a remainder of 79.
Record the quotient 3 as the next digit in the result. 
Result so far: 3973.0
If we subtract 273 from 352, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 7:
When dividing 790 by 91, we get 8 with a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 3973.8
If we take 728 away from 790, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 8:
91 can be fit into 620 6 times, resulting in a remainder of 74.
The next digit of our result is 6. 
Result so far: 3973.86
Subtracting 546 from 620 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 9:
The number 91 fits into 740 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 3973.868
The remainder is 12 after subtracting 728 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 10:
The number 91 fits into 120 1 times, leaving a remainder of 29.
Write down 1 as next digit of the result. 
Result so far: 3973.8681
If we subtract 91 from 120, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 11:
91 can be fit into 290 3 times, resulting in a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 3973.86813
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 12:
When dividing 170 by 91, we get 1 with a remainder of 79.
The next digit of our result is 1. 
Result so far: 3973.868131
If we subtract 91 from 170, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 13:
When dividing 790 by 91, we get 8 with a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 3973.8681318
The remainder is 62 after subtracting 728 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 14:
If we divide 620 by 91, we get 6 and a remainder of 74.
Put 6 as the next digit of the answer. 
Result so far: 3973.86813186
If we subtract 546 from 620, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Our division results in 3973.86813186 with a remaining 7.4e-08.