We look at the division of 88904253 by 648 
The aim is to understand the frequency of 648 in 88904253.

On to step 1:
When dividing 8 by 648, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 648

Moving on to step 2:
648 goes into 88 0 times with a remainder of 88.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 88 and we're left with 88.
Bring next digit (9) of the dividend behind the 88 and repeat the process: 889 / 648

On to step 3:
889 divided by 648 is 1 with a remainder of 241.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 648 away from 889, we end up with 241.
Grab the next digit (0) from the dividend, add it to 241, then carry on: 2410 / 648

Let's proceed to step 4:
648 can be fit into 2410 3 times, resulting in a remainder of 466.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 1944 away from 2410, we end up with 466.
Take the next digit (4) from the dividend and append it to 466, then repeat: 4664 / 648

Advancing to step 5:
If we divide 4664 by 648, we get 7 and a remainder of 128.
The number 7 becomes the next digit in our result. 
Result so far: 137.0
Subtracting 4536 from 4664 leaves us with 128.
Fetch the next digit (2) from the dividend, attach it to 128 and continue: 1282 / 648

Step 6:
When dividing 1282 by 648, we get 1 with a remainder of 634.
Record the quotient 1 as the next digit in the result. 
Result so far: 1371.0
If we subtract 648 from 1282, we get 634.
Fetch the next digit (5) from the dividend, attach it to 634 and continue: 6345 / 648

Moving on to step 7:
If we divide 6345 by 648, we get 9 and a remainder of 513.
Record the quotient 9 as the next digit in the result. 
Result so far: 13719.0
The remainder is 513 after subtracting 5832 from 6345.
Grab the next digit (3) from the dividend, add it to 513, then carry on: 5133 / 648

Step 8:
If we divide 5133 by 648, we get 7 and a remainder of 597.
Put 7 as the next digit of the answer. 
Result so far: 137197.0
Deduct 4536 from 5133 and we're left with 597.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5970, and continue the process.

Advancing to step 9:
648 goes into 5970 9 times with a remainder of 138.
Use 9 as the next digit of our solution. 
Result so far: 137197.9
Subtracting 5832 from 5970 leaves us with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

On to step 10:
648 goes into 1380 2 times with a remainder of 84.
The next digit of our result is 2. 
Result so far: 137197.92
The remainder is 84 after subtracting 1296 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 11:
When dividing 840 by 648, we get 1 with a remainder of 192.
The number 1 becomes the next digit in our result. 
Result so far: 137197.921
Deduct 648 from 840 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 12:
When dividing 1920 by 648, we get 2 with a remainder of 624.
The number 2 becomes the next digit in our result. 
Result so far: 137197.9212
If we subtract 1296 from 1920, we get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Step 13:
The number 648 fits into 6240 9 times, leaving a remainder of 408.
The number 9 becomes the next digit in our result. 
Result so far: 137197.92129
If we subtract 5832 from 6240, 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.

Let's proceed to step 14:
648 can be fit into 4080 6 times, resulting in a remainder of 192.
The number 6 becomes the next digit in our result. 
Result so far: 137197.921296
If we take 3888 away from 4080, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Step 15:
648 goes into 1920 2 times with a remainder of 624.
Put 2 as the next digit of the answer. 
Result so far: 137197.9212962
If we take 1296 away from 1920, we end up with 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Step 16:
The number 648 fits into 6240 9 times, leaving a remainder of 408.
Use 9 as the next digit of our solution. 
Result so far: 137197.92129629
The remainder is 408 after subtracting 5832 from 6240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

The final result is 137197.92129629 with a remainder of 4.08e-07.