We look at the division of 64259900 by 631 
The aim is to understand the frequency of 631 in 64259900.

Let's proceed to step 1:
631 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 631

Going ahead to step 2:
When dividing 64 by 631, we get 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Grab the next digit (2) from the dividend, add it to 64, then carry on: 642 / 631

Advancing to step 3:
631 can be fit into 642 1 times, resulting in a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 631 from 642 to get 11.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 631

Let's proceed to step 4:
If we divide 115 by 631, we get 0 and a remainder of 115.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 115, we end up with 115.
Bring next digit (9) of the dividend behind the 115 and repeat the process: 1159 / 631

On to step 5:
If we divide 1159 by 631, we get 1 and a remainder of 528.
Put 1 as the next digit of the answer. 
Result so far: 101.0
Deduct 631 from 1159 and we're left with 528.
Grab the next digit (9) from the dividend, add it to 528, then carry on: 5289 / 631

On to step 6:
If we divide 5289 by 631, we get 8 and a remainder of 241.
Put 8 as the next digit of the answer. 
Result so far: 1018.0
If we take 5048 away from 5289, we end up with 241.
Include the next digit (0) from the dividend after 241, then repeat: 2410 / 631

Step 7:
2410 divided by 631 is 3 with a remainder of 517.
Put 3 as the next digit of the answer. 
Result so far: 10183.0
Deduct 1893 from 2410 and we're left with 517.
Fetch the next digit (0) from the dividend, attach it to 517 and continue: 5170 / 631

Going ahead to step 8:
5170 divided by 631 is 8 with a remainder of 122.
Put 8 as the next digit of the answer. 
Result so far: 101838.0
Deduct 5048 from 5170 and we're left with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 9:
The number 631 fits into 1220 1 times, leaving a remainder of 589.
The number 1 becomes the next digit in our result. 
Result so far: 101838.1
If we subtract 631 from 1220, we get 589.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5890, and continue the process.

Moving on to step 10:
631 can be fit into 5890 9 times, resulting in a remainder of 211.
Use 9 as the next digit of our solution. 
Result so far: 101838.19
If we take 5679 away from 5890, we end up with 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:
The number 631 fits into 2110 3 times, leaving a remainder of 217.
The number 3 becomes the next digit in our result. 
Result so far: 101838.193
Deduct 1893 from 2110 and we're left with 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

On to step 12:
If we divide 2170 by 631, we get 3 and a remainder of 277.
Record the quotient 3 as the next digit in the result. 
Result so far: 101838.1933
Deduct 1893 from 2170 and we're left with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

The final outcome is 101838.1933, with a leftover of 0.00277.