We look at the division of 83266170 by 644 
The aim is to understand the frequency of 644 in 83266170.

Let's proceed to step 1:
If we divide 8 by 644, we get 0 and 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.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 644

Advancing to step 2:
83 divided by 644 is 0 with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Bring next digit (2) of the dividend behind the 83 and repeat the process: 832 / 644

Step 3:
The number 644 fits into 832 1 times, leaving a remainder of 188.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 644 from 832 to get 188.
Take the next digit (6) from the dividend and append it to 188, then repeat: 1886 / 644

Advancing to step 4:
If we divide 1886 by 644, we get 2 and a remainder of 598.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 1288 from 1886, we get 598.
Bring next digit (6) of the dividend behind the 598 and repeat the process: 5986 / 644

Advancing to step 5:
When dividing 5986 by 644, we get 9 with a remainder of 190.
Record the quotient 9 as the next digit in the result. 
Result so far: 129.0
Deduct 5796 from 5986 and we're left with 190.
Take the next digit (1) from the dividend and append it to 190, then repeat: 1901 / 644

Let's proceed to step 6:
When dividing 1901 by 644, we get 2 with a remainder of 613.
Write down 2 as next digit of the result. 
Result so far: 1292.0
Deduct 1288 from 1901 and we're left with 613.
Include the next digit (7) from the dividend after 613, then repeat: 6137 / 644

Step 7:
644 can be fit into 6137 9 times, resulting in a remainder of 341.
The next digit of our result is 9. 
Result so far: 12929.0
Subtract 5796 from 6137 to get 341.
Include the next digit (0) from the dividend after 341, then repeat: 3410 / 644

Going ahead to step 8:
When dividing 3410 by 644, we get 5 with a remainder of 190.
The next digit of our result is 5. 
Result so far: 129295.0
Subtract 3220 from 3410 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 9:
If we divide 1900 by 644, we get 2 and a remainder of 612.
Use 2 as the next digit of our solution. 
Result so far: 129295.2
If we subtract 1288 from 1900, we get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Advancing to step 10:
6120 divided by 644 is 9 with a remainder of 324.
Put 9 as the next digit of the answer. 
Result so far: 129295.29
If we take 5796 away from 6120, we end up 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.

Let's proceed to step 11:
3240 divided by 644 is 5 with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 129295.295
The remainder is 20 after subtracting 3220 from 3240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
If we divide 200 by 644, we get 0 and a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 129295.295
Subtracting 0 from 200 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.

Moving on to step 13:
The number 644 fits into 2000 3 times, leaving a remainder of 68.
The next digit of our result is 3. 
Result so far: 129295.29503
If we take 1932 away from 2000, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 14:
644 goes into 680 1 times with a remainder of 36.
The number 1 becomes the next digit in our result. 
Result so far: 129295.295031
Subtracting 644 from 680 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 15:
360 divided by 644 is 0 with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 129295.295031
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 16:
3600 divided by 644 is 5 with a remainder of 380.
Use 5 as the next digit of our solution. 
Result so far: 129295.29503105
Subtracting 3220 from 3600 leaves us with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

In conclusion, the division gives 129295.29503105 with a balance of 3.8e-07.