We're dividing 84974006 by 648 
The aim is to understand the frequency of 648 in 84974006.

On to step 1:
When dividing 8 by 648, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 648

Going ahead to step 2:
When dividing 84 by 648, we get 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Take the next digit (9) from the dividend and append it to 84, then repeat: 849 / 648

On to step 3:
When dividing 849 by 648, we get 1 with a remainder of 201.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 648 from 849 and we're left with 201.
Include the next digit (7) from the dividend after 201, then repeat: 2017 / 648

Going ahead to step 4:
When dividing 2017 by 648, we get 3 with a remainder of 73.
The next digit of our result is 3. 
Result so far: 13.0
If we subtract 1944 from 2017, we get 73.
Include the next digit (4) from the dividend after 73, then repeat: 734 / 648

Let's proceed to step 5:
The number 648 fits into 734 1 times, leaving a remainder of 86.
Put 1 as the next digit of the answer. 
Result so far: 131.0
The remainder is 86 after subtracting 648 from 734.
Fetch the next digit (0) from the dividend, attach it to 86 and continue: 860 / 648

Let's proceed to step 6:
648 can be fit into 860 1 times, resulting in a remainder of 212.
The next digit of our result is 1. 
Result so far: 1311.0
If we take 648 away from 860, we end up with 212.
Grab the next digit (0) from the dividend, add it to 212, then carry on: 2120 / 648

Going ahead to step 7:
If we divide 2120 by 648, we get 3 and a remainder of 176.
Record the quotient 3 as the next digit in the result. 
Result so far: 13113.0
If we take 1944 away from 2120, we end up with 176.
Grab the next digit (6) from the dividend, add it to 176, then carry on: 1766 / 648

Step 8:
If we divide 1766 by 648, we get 2 and a remainder of 470.
The number 2 becomes the next digit in our result. 
Result so far: 131132.0
Deduct 1296 from 1766 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Going ahead to step 9:
When dividing 4700 by 648, we get 7 with a remainder of 164.
Put 7 as the next digit of the answer. 
Result so far: 131132.7
Subtract 4536 from 4700 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Moving on to step 10:
1640 divided by 648 is 2 with a remainder of 344.
Use 2 as the next digit of our solution. 
Result so far: 131132.72
Deduct 1296 from 1640 and we're left with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

On to step 11:
648 can be fit into 3440 5 times, resulting in a remainder of 200.
The number 5 becomes the next digit in our result. 
Result so far: 131132.725
Subtracting 3240 from 3440 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 12:
The number 648 fits into 2000 3 times, leaving a remainder of 56.
Write down 3 as next digit of the result. 
Result so far: 131132.7253
Subtracting 1944 from 2000 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 13:
648 goes into 560 0 times with a remainder of 560.
The next digit of our result is 0. 
Result so far: 131132.7253
Deduct 0 from 560 and we're left with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 14:
If we divide 5600 by 648, we get 8 and a remainder of 416.
The number 8 becomes the next digit in our result. 
Result so far: 131132.725308
Subtract 5184 from 5600 to get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Advancing to step 15:
If we divide 4160 by 648, we get 6 and a remainder of 272.
Use 6 as the next digit of our solution. 
Result so far: 131132.7253086
Subtract 3888 from 4160 to get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Advancing to step 16:
The number 648 fits into 2720 4 times, leaving a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 131132.72530864
Deduct 2592 from 2720 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The quotient of the division is 131132.72530864, and the remainder is 1.28e-07.