We divide 654170 by 91
The aim is to understand the frequency of 91 in 654170.

Step 1:
If we divide 6 by 91, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 91

Moving on to step 2:
When dividing 65 by 91, we get 0 with a remainder of 65.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 65 leaves us with 65.
Fetch the next digit (4) from the dividend, attach it to 65 and continue: 654 / 91

On to step 3:
654 divided by 91 is 7 with a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 637 from 654 and we're left with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 91

On to step 4:
91 goes into 171 1 times with a remainder of 80.
The next digit of our result is 1. 
Result so far: 71.0
The remainder is 80 after subtracting 91 from 171.
Grab the next digit (7) from the dividend, add it to 80, then carry on: 807 / 91

Going ahead to step 5:
The number 91 fits into 807 8 times, leaving a remainder of 79.
Write down 8 as next digit of the result. 
Result so far: 718.0
The remainder is 79 after subtracting 728 from 807.
Grab the next digit (0) from the dividend, add it to 79, then carry on: 790 / 91

Moving on to step 6:
If we divide 790 by 91, we get 8 and a remainder of 62.
The next digit of our result is 8. 
Result so far: 7188.0
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.

Going ahead to step 7:
The number 91 fits into 620 6 times, leaving a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 7188.6
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.

Step 8:
91 goes into 740 8 times with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 7188.68
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
The number 91 fits into 120 1 times, leaving a remainder of 29.
The next digit of our result is 1. 
Result so far: 7188.681
If we take 91 away from 120, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 10:
The number 91 fits into 290 3 times, leaving a remainder of 17.
The next digit of our result is 3. 
Result so far: 7188.6813
If we subtract 273 from 290, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 11:
170 divided by 91 is 1 with a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 7188.68131
Deduct 91 from 170 and we're left with 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 12:
The number 91 fits into 790 8 times, leaving a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 7188.681318
Deduct 728 from 790 and we're left 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.

Step 13:
91 goes into 620 6 times with a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 7188.6813186
If we take 546 away from 620, we end up 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 14:
91 can be fit into 740 8 times, resulting in a remainder of 12.
The next digit of our result is 8. 
Result so far: 7188.68131868
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.

The final outcome is 7188.68131868, with a leftover of 1.2e-08.