We're dividing 408706 by 91 
The aim is to understand the frequency of 91 in 408706.

Going ahead to step 1:
4 divided by 91 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 91

Step 2:
The number 91 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Include the next digit (8) from the dividend after 40, then repeat: 408 / 91

On to step 3:
408 divided by 91 is 4 with a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 364 from 408 to get 44.
Take the next digit (7) from the dividend and append it to 44, then repeat: 447 / 91

Going ahead to step 4:
The number 91 fits into 447 4 times, leaving a remainder of 83.
The next digit of our result is 4. 
Result so far: 44.0
The remainder is 83 after subtracting 364 from 447.
Bring next digit (0) of the dividend behind the 83 and repeat the process: 830 / 91

On to step 5:
91 can be fit into 830 9 times, resulting in a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 449.0
Deduct 819 from 830 and we're left with 11.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 91

Let's proceed to step 6:
116 divided by 91 is 1 with a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 4491.0
If we take 91 away from 116, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 7:
When dividing 250 by 91, we get 2 with a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 4491.2
If we take 182 away from 250, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 8:
91 can be fit into 680 7 times, resulting in a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 4491.27
If we subtract 637 from 680, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 9:
The number 91 fits into 430 4 times, leaving a remainder of 66.
The next digit of our result is 4. 
Result so far: 4491.274
If we subtract 364 from 430, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 10:
The number 91 fits into 660 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 4491.2747
The remainder is 23 after subtracting 637 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 11:
230 divided by 91 is 2 with a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 4491.27472
Deduct 182 from 230 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 12:
91 can be fit into 480 5 times, resulting in a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 4491.274725
Deduct 455 from 480 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 13:
91 goes into 250 2 times with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 4491.2747252
Subtract 182 from 250 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 14:
If we divide 680 by 91, we get 7 and a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 4491.27472527
If we subtract 637 from 680, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The quotient of the division is 4491.27472527, and the remainder is 4.3e-08.