We look at the division of 64857564 by 649 
The aim is to understand the frequency of 649 in 64857564.

On to step 1:
If we divide 6 by 649, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 649

On to step 2:
The number 649 fits into 64 0 times, leaving a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Bring next digit (8) of the dividend behind the 64 and repeat the process: 648 / 649

Let's proceed to step 3:
648 divided by 649 is 0 with a remainder of 648.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 648, we get 648.
Take the next digit (5) from the dividend and append it to 648, then repeat: 6485 / 649

Advancing to step 4:
If we divide 6485 by 649, we get 9 and a remainder of 644.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtracting 5841 from 6485 leaves us with 644.
Bring next digit (7) of the dividend behind the 644 and repeat the process: 6447 / 649

Step 5:
When dividing 6447 by 649, we get 9 with a remainder of 606.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
Deduct 5841 from 6447 and we're left with 606.
Fetch the next digit (5) from the dividend, attach it to 606 and continue: 6065 / 649

Advancing to step 6:
If we divide 6065 by 649, we get 9 and a remainder of 224.
Write down 9 as next digit of the result. 
Result so far: 999.0
If we take 5841 away from 6065, we end up with 224.
Fetch the next digit (6) from the dividend, attach it to 224 and continue: 2246 / 649

Going ahead to step 7:
The number 649 fits into 2246 3 times, leaving a remainder of 299.
Use 3 as the next digit of our solution. 
Result so far: 9993.0
Subtracting 1947 from 2246 leaves us with 299.
Grab the next digit (4) from the dividend, add it to 299, then carry on: 2994 / 649

Step 8:
649 can be fit into 2994 4 times, resulting in a remainder of 398.
Record the quotient 4 as the next digit in the result. 
Result so far: 99934.0
Subtracting 2596 from 2994 leaves us with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 9:
If we divide 3980 by 649, we get 6 and a remainder of 86.
Record the quotient 6 as the next digit in the result. 
Result so far: 99934.6
The remainder is 86 after subtracting 3894 from 3980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 10:
649 can be fit into 860 1 times, resulting in a remainder of 211.
The next digit of our result is 1. 
Result so far: 99934.61
Subtract 649 from 860 to get 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Advancing to step 11:
When dividing 2110 by 649, we get 3 with a remainder of 163.
Use 3 as the next digit of our solution. 
Result so far: 99934.613
Subtracting 1947 from 2110 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Let's proceed to step 12:
649 goes into 1630 2 times with a remainder of 332.
Put 2 as the next digit of the answer. 
Result so far: 99934.6132
If we take 1298 away from 1630, we end up with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Step 13:
649 can be fit into 3320 5 times, resulting in a remainder of 75.
Write down 5 as next digit of the result. 
Result so far: 99934.61325
Subtract 3245 from 3320 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Advancing to step 14:
If we divide 750 by 649, we get 1 and a remainder of 101.
The next digit of our result is 1. 
Result so far: 99934.613251
The remainder is 101 after subtracting 649 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Step 15:
649 goes into 1010 1 times with a remainder of 361.
Write down 1 as next digit of the result. 
Result so far: 99934.6132511
Subtract 649 from 1010 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Our division results in 99934.6132511 with a remaining 3.61e-06.