We look at the division of 12891573 by 626 
The aim is to understand the frequency of 626 in 12891573.

On to step 1:
The number 626 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 626

Moving on to step 2:
The number 626 fits into 12 0 times, leaving a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 626

On to step 3:
626 goes into 128 0 times with a remainder of 128.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 128 after subtracting 0 from 128.
Include the next digit (9) from the dividend after 128, then repeat: 1289 / 626

Going ahead to step 4:
If we divide 1289 by 626, we get 2 and a remainder of 37.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1252 from 1289 leaves us with 37.
Include the next digit (1) from the dividend after 37, then repeat: 371 / 626

Going ahead to step 5:
If we divide 371 by 626, we get 0 and a remainder of 371.
Write down 0 as next digit of the result. 
Result so far: 20.0
If we take 0 away from 371, we end up with 371.
Include the next digit (5) from the dividend after 371, then repeat: 3715 / 626

Moving on to step 6:
When dividing 3715 by 626, we get 5 with a remainder of 585.
Write down 5 as next digit of the result. 
Result so far: 205.0
The remainder is 585 after subtracting 3130 from 3715.
Include the next digit (7) from the dividend after 585, then repeat: 5857 / 626

Going ahead to step 7:
626 goes into 5857 9 times with a remainder of 223.
Record the quotient 9 as the next digit in the result. 
Result so far: 2059.0
If we subtract 5634 from 5857, we get 223.
Take the next digit (3) from the dividend and append it to 223, then repeat: 2233 / 626

Going ahead to step 8:
If we divide 2233 by 626, we get 3 and a remainder of 355.
Record the quotient 3 as the next digit in the result. 
Result so far: 20593.0
If we take 1878 away from 2233, we end up with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

On to step 9:
When dividing 3550 by 626, we get 5 with a remainder of 420.
Record the quotient 5 as the next digit in the result. 
Result so far: 20593.5
If we subtract 3130 from 3550, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Step 10:
626 can be fit into 4200 6 times, resulting in a remainder of 444.
The next digit of our result is 6. 
Result so far: 20593.56
Subtracting 3756 from 4200 leaves us with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Moving on to step 11:
626 goes into 4440 7 times with a remainder of 58.
Put 7 as the next digit of the answer. 
Result so far: 20593.567
Deduct 4382 from 4440 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 12:
If we divide 580 by 626, we get 0 and a remainder of 580.
Write down 0 as next digit of the result. 
Result so far: 20593.567
If we take 0 away from 580, we end up with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Advancing to step 13:
626 can be fit into 5800 9 times, resulting in a remainder of 166.
Record the quotient 9 as the next digit in the result. 
Result so far: 20593.56709
If we subtract 5634 from 5800, we get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Step 14:
When dividing 1660 by 626, we get 2 with a remainder of 408.
The number 2 becomes the next digit in our result. 
Result so far: 20593.567092
If we subtract 1252 from 1660, we get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Step 15:
If we divide 4080 by 626, we get 6 and a remainder of 324.
Use 6 as the next digit of our solution. 
Result so far: 20593.5670926
Subtracting 3756 from 4080 leaves us with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Step 16:
3240 divided by 626 is 5 with a remainder of 110.
Put 5 as the next digit of the answer. 
Result so far: 20593.56709265
Subtracting 3130 from 3240 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

In conclusion, the division gives 20593.56709265 with a balance of 1.1e-07.