400706 ÷ 91 
The aim is to understand the frequency of 91 in 400706.

Moving on to step 1:
91 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 91

Moving on to step 2:
91 goes into 40 0 times with 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.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 91

Step 3:
The number 91 fits into 400 4 times, leaving a remainder of 36.
The next digit of our result is 4. 
Result so far: 4.0
If we take 364 away from 400, we end up with 36.
Take the next digit (7) from the dividend and append it to 36, then repeat: 367 / 91

Moving on to step 4:
367 divided by 91 is 4 with a remainder of 3.
The next digit of our result is 4. 
Result so far: 44.0
The remainder is 3 after subtracting 364 from 367.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 91

Moving on to step 5:
The number 91 fits into 30 0 times, leaving a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 440.0
The remainder is 30 after subtracting 0 from 30.
Bring next digit (6) of the dividend behind the 30 and repeat the process: 306 / 91

Advancing to step 6:
91 goes into 306 3 times with a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 4403.0
If we subtract 273 from 306, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 7:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Record the quotient 3 as the next digit in the result. 
Result so far: 4403.3
If we take 273 away from 330, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 8:
570 divided by 91 is 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 4403.36
Subtract 546 from 570 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 9:
When dividing 240 by 91, we get 2 with a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 4403.362
If we subtract 182 from 240, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 10:
The number 91 fits into 580 6 times, leaving a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 4403.3626
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
When dividing 340 by 91, we get 3 with a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 4403.36263
Subtracting 273 from 340 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 12:
91 goes into 670 7 times with a remainder of 33.
The next digit of our result is 7. 
Result so far: 4403.362637
Subtracting 637 from 670 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 13:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 4403.3626373
Deduct 273 from 330 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 14:
570 divided by 91 is 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 4403.36263736
The remainder is 24 after subtracting 546 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 4403.36263736 with a remainder of 2.4e-08.