We divide 601565 by 91
The aim is to understand the frequency of 91 in 601565.

Let's proceed to step 1:
If we divide 6 by 91, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (0) from the dividend after 6, then repeat: 60 / 91

Step 2:
The number 91 fits into 60 0 times, leaving a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 60 to get 60.
Take the next digit (1) from the dividend and append it to 60, then repeat: 601 / 91

Going ahead to step 3:
When dividing 601 by 91, we get 6 with a remainder of 55.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 546 from 601 and we're left with 55.
Fetch the next digit (5) from the dividend, attach it to 55 and continue: 555 / 91

Moving on to step 4:
91 goes into 555 6 times with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 66.0
If we subtract 546 from 555, we get 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 91

Let's proceed to step 5:
If we divide 96 by 91, we get 1 and a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 661.0
If we subtract 91 from 96, we get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 91

On to step 6:
91 goes into 55 0 times with a remainder of 55.
The next digit of our result is 0. 
Result so far: 6610.0
Subtract 0 from 55 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 7:
550 divided by 91 is 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 6610.6
Deduct 546 from 550 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
91 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 6610.6
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
91 can be fit into 400 4 times, resulting in a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 6610.604
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 10:
360 divided by 91 is 3 with a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 6610.6043
If we take 273 away from 360, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 11:
When dividing 870 by 91, we get 9 with a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 6610.60439
If we take 819 away from 870, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 12:
The number 91 fits into 510 5 times, leaving a remainder of 55.
Write down 5 as next digit of the result. 
Result so far: 6610.604395
If we take 455 away from 510, we end up with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 13:
91 can be fit into 550 6 times, resulting in a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 6610.6043956
The remainder is 4 after subtracting 546 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 14:
When dividing 40 by 91, we get 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 6610.6043956
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 6610.6043956 with a balance of 4e-08.