We're dividing 83138309 by 625 
The aim is to understand the frequency of 625 in 83138309.

Let's proceed to step 1:
The number 625 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 625

Advancing to step 2:
When dividing 83 by 625, we get 0 with a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Take the next digit (1) from the dividend and append it to 83, then repeat: 831 / 625

Step 3:
831 divided by 625 is 1 with a remainder of 206.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 625 from 831, we get 206.
Fetch the next digit (3) from the dividend, attach it to 206 and continue: 2063 / 625

Advancing to step 4:
If we divide 2063 by 625, we get 3 and a remainder of 188.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 188 after subtracting 1875 from 2063.
Append the next digit (8) from the dividend to 188 and continue with: 1888 / 625

Going ahead to step 5:
1888 divided by 625 is 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 133.0
If we take 1875 away from 1888, we end up with 13.
Grab the next digit (3) from the dividend, add it to 13, then carry on: 133 / 625

Step 6:
625 goes into 133 0 times with a remainder of 133.
The next digit of our result is 0. 
Result so far: 1330.0
Subtracting 0 from 133 leaves us with 133.
Append the next digit (0) from the dividend to 133 and continue with: 1330 / 625

Let's proceed to step 7:
625 can be fit into 1330 2 times, resulting in a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 13302.0
Deduct 1250 from 1330 and we're left with 80.
Append the next digit (9) from the dividend to 80 and continue with: 809 / 625

Step 8:
If we divide 809 by 625, we get 1 and a remainder of 184.
Use 1 as the next digit of our solution. 
Result so far: 133021.0
If we subtract 625 from 809, we get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Advancing to step 9:
1840 divided by 625 is 2 with a remainder of 590.
The number 2 becomes the next digit in our result. 
Result so far: 133021.2
Subtracting 1250 from 1840 leaves us with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 10:
5900 divided by 625 is 9 with a remainder of 275.
Write down 9 as next digit of the result. 
Result so far: 133021.29
If we subtract 5625 from 5900, we get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 11:
If we divide 2750 by 625, we get 4 and a remainder of 250.
The number 4 becomes the next digit in our result. 
Result so far: 133021.294
Subtracting 2500 from 2750 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Advancing to step 12:
625 goes into 2500 4 times with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 133021.2944
Subtract 2500 from 2500 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 133021.2944 and a remainder of 0.0.