We look at the division of 91450226 by 647 
The aim is to understand the frequency of 647 in 91450226.

Step 1:
If we divide 9 by 647, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 647

Step 2:
647 can be fit into 91 0 times, resulting in a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Append the next digit (4) from the dividend to 91 and continue with: 914 / 647

Advancing to step 3:
The number 647 fits into 914 1 times, leaving a remainder of 267.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 647 from 914 leaves us with 267.
Append the next digit (5) from the dividend to 267 and continue with: 2675 / 647

Moving on to step 4:
2675 divided by 647 is 4 with a remainder of 87.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 2588 from 2675, we get 87.
Take the next digit (0) from the dividend and append it to 87, then repeat: 870 / 647

Moving on to step 5:
The number 647 fits into 870 1 times, leaving a remainder of 223.
Use 1 as the next digit of our solution. 
Result so far: 141.0
Subtracting 647 from 870 leaves us with 223.
Include the next digit (2) from the dividend after 223, then repeat: 2232 / 647

Advancing to step 6:
2232 divided by 647 is 3 with a remainder of 291.
The next digit of our result is 3. 
Result so far: 1413.0
Subtracting 1941 from 2232 leaves us with 291.
Append the next digit (2) from the dividend to 291 and continue with: 2912 / 647

Let's proceed to step 7:
The number 647 fits into 2912 4 times, leaving a remainder of 324.
Put 4 as the next digit of the answer. 
Result so far: 14134.0
Deduct 2588 from 2912 and we're left with 324.
Bring next digit (6) of the dividend behind the 324 and repeat the process: 3246 / 647

Let's proceed to step 8:
647 goes into 3246 5 times with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 141345.0
The remainder is 11 after subtracting 3235 from 3246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
If we divide 110 by 647, we get 0 and a remainder of 110.
The next digit of our result is 0. 
Result so far: 141345.0
If we subtract 0 from 110, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 10:
The number 647 fits into 1100 1 times, leaving a remainder of 453.
Write down 1 as next digit of the result. 
Result so far: 141345.01
Subtracting 647 from 1100 leaves us with 453.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4530, and continue the process.

Going ahead to step 11:
647 can be fit into 4530 7 times, resulting in a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 141345.017
Subtracting 4529 from 4530 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 12:
When dividing 10 by 647, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 141345.017
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
647 can be fit into 100 0 times, resulting in a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 141345.017
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The quotient of the division is 141345.017, and the remainder is 0.0001.