We're dividing 91652237 by 648 
The aim is to understand the frequency of 648 in 91652237.

Step 1:
When dividing 9 by 648, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 648

Advancing to step 2:
If we divide 91 by 648, we get 0 and a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Bring next digit (6) of the dividend behind the 91 and repeat the process: 916 / 648

Step 3:
916 divided by 648 is 1 with a remainder of 268.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 648 from 916, we get 268.
Take the next digit (5) from the dividend and append it to 268, then repeat: 2685 / 648

Advancing to step 4:
648 goes into 2685 4 times with a remainder of 93.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 2592 from 2685 and we're left with 93.
Append the next digit (2) from the dividend to 93 and continue with: 932 / 648

On to step 5:
When dividing 932 by 648, we get 1 with a remainder of 284.
The next digit of our result is 1. 
Result so far: 141.0
If we take 648 away from 932, we end up with 284.
Take the next digit (2) from the dividend and append it to 284, then repeat: 2842 / 648

Advancing to step 6:
The number 648 fits into 2842 4 times, leaving a remainder of 250.
Write down 4 as next digit of the result. 
Result so far: 1414.0
The remainder is 250 after subtracting 2592 from 2842.
Include the next digit (3) from the dividend after 250, then repeat: 2503 / 648

Advancing to step 7:
The number 648 fits into 2503 3 times, leaving a remainder of 559.
Use 3 as the next digit of our solution. 
Result so far: 14143.0
Deduct 1944 from 2503 and we're left with 559.
Grab the next digit (7) from the dividend, add it to 559, then carry on: 5597 / 648

Going ahead to step 8:
5597 divided by 648 is 8 with a remainder of 413.
Write down 8 as next digit of the result. 
Result so far: 141438.0
The remainder is 413 after subtracting 5184 from 5597.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Step 9:
648 goes into 4130 6 times with a remainder of 242.
The next digit of our result is 6. 
Result so far: 141438.6
If we take 3888 away from 4130, we end up with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 10:
648 can be fit into 2420 3 times, resulting in a remainder of 476.
The next digit of our result is 3. 
Result so far: 141438.63
Subtracting 1944 from 2420 leaves us with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Step 11:
If we divide 4760 by 648, we get 7 and a remainder of 224.
The next digit of our result is 7. 
Result so far: 141438.637
The remainder is 224 after subtracting 4536 from 4760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 12:
If we divide 2240 by 648, we get 3 and a remainder of 296.
Record the quotient 3 as the next digit in the result. 
Result so far: 141438.6373
Subtract 1944 from 2240 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Going ahead to step 13:
648 goes into 2960 4 times with a remainder of 368.
The next digit of our result is 4. 
Result so far: 141438.63734
Subtracting 2592 from 2960 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Going ahead to step 14:
When dividing 3680 by 648, we get 5 with a remainder of 440.
Write down 5 as next digit of the result. 
Result so far: 141438.637345
Subtracting 3240 from 3680 leaves us with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Advancing to step 15:
648 goes into 4400 6 times with a remainder of 512.
The number 6 becomes the next digit in our result. 
Result so far: 141438.6373456
Subtracting 3888 from 4400 leaves us with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Step 16:
When dividing 5120 by 648, we get 7 with a remainder of 584.
Write down 7 as next digit of the result. 
Result so far: 141438.63734567
Subtracting 4536 from 5120 leaves us with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Our division results in 141438.63734567 with a remaining 5.84e-07.