We're dividing 85312550 by 644 
The aim is to understand the frequency of 644 in 85312550.

Going ahead to step 1:
644 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 644

Advancing to step 2:
644 can be fit into 85 0 times, resulting in a remainder of 85.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Include the next digit (3) from the dividend after 85, then repeat: 853 / 644

On to step 3:
When dividing 853 by 644, we get 1 with a remainder of 209.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 209 after subtracting 644 from 853.
Bring next digit (1) of the dividend behind the 209 and repeat the process: 2091 / 644

Step 4:
644 goes into 2091 3 times with a remainder of 159.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
The remainder is 159 after subtracting 1932 from 2091.
Grab the next digit (2) from the dividend, add it to 159, then carry on: 1592 / 644

On to step 5:
644 goes into 1592 2 times with a remainder of 304.
Use 2 as the next digit of our solution. 
Result so far: 132.0
The remainder is 304 after subtracting 1288 from 1592.
Grab the next digit (5) from the dividend, add it to 304, then carry on: 3045 / 644

Moving on to step 6:
The number 644 fits into 3045 4 times, leaving a remainder of 469.
Use 4 as the next digit of our solution. 
Result so far: 1324.0
If we take 2576 away from 3045, we end up with 469.
Take the next digit (5) from the dividend and append it to 469, then repeat: 4695 / 644

On to step 7:
The number 644 fits into 4695 7 times, leaving a remainder of 187.
The next digit of our result is 7. 
Result so far: 13247.0
Subtracting 4508 from 4695 leaves us with 187.
Bring next digit (0) of the dividend behind the 187 and repeat the process: 1870 / 644

Let's proceed to step 8:
If we divide 1870 by 644, we get 2 and a remainder of 582.
Write down 2 as next digit of the result. 
Result so far: 132472.0
Subtracting 1288 from 1870 leaves us with 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Moving on to step 9:
When dividing 5820 by 644, we get 9 with a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 132472.9
Subtracting 5796 from 5820 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 10:
When dividing 240 by 644, we get 0 with a remainder of 240.
The number 0 becomes the next digit in our result. 
Result so far: 132472.9
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 11:
644 goes into 2400 3 times with a remainder of 468.
Use 3 as the next digit of our solution. 
Result so far: 132472.903
The remainder is 468 after subtracting 1932 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Let's proceed to step 12:
4680 divided by 644 is 7 with a remainder of 172.
Record the quotient 7 as the next digit in the result. 
Result so far: 132472.9037
If we take 4508 away from 4680, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Let's proceed to step 13:
1720 divided by 644 is 2 with a remainder of 432.
The next digit of our result is 2. 
Result so far: 132472.90372
If we take 1288 away from 1720, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

On to step 14:
644 goes into 4320 6 times with a remainder of 456.
Record the quotient 6 as the next digit in the result. 
Result so far: 132472.903726
The remainder is 456 after subtracting 3864 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Going ahead to step 15:
644 goes into 4560 7 times with a remainder of 52.
The next digit of our result is 7. 
Result so far: 132472.9037267
Deduct 4508 from 4560 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 16:
644 can be fit into 520 0 times, resulting in a remainder of 520.
The next digit of our result is 0. 
Result so far: 132472.9037267
If we take 0 away from 520, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The quotient of the division is 132472.9037267, and the remainder is 5.2e-07.