We look at the division of 85466210 by 39 
The aim is to understand the frequency of 39 in 85466210.

Step 1:
When dividing 8 by 39, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 39

On to step 2:
If we divide 85 by 39, we get 2 and a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 78 from 85, we get 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 39

Moving on to step 3:
The number 39 fits into 74 1 times, leaving a remainder of 35.
The next digit of our result is 1. 
Result so far: 21.0
Subtract 39 from 74 to get 35.
Grab the next digit (6) from the dividend, add it to 35, then carry on: 356 / 39

Moving on to step 4:
If we divide 356 by 39, we get 9 and a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 219.0
If we take 351 away from 356, we end up with 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 39

Moving on to step 5:
56 divided by 39 is 1 with a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 2191.0
If we take 39 away from 56, we end up with 17.
Bring next digit (2) of the dividend behind the 17 and repeat the process: 172 / 39

Going ahead to step 6:
When dividing 172 by 39, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 21914.0
Subtracting 156 from 172 leaves us with 16.
Append the next digit (1) from the dividend to 16 and continue with: 161 / 39

Moving on to step 7:
If we divide 161 by 39, we get 4 and a remainder of 5.
The next digit of our result is 4. 
Result so far: 219144.0
The remainder is 5 after subtracting 156 from 161.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 39

Advancing to step 8:
39 goes into 50 1 times with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 2191441.0
If we take 39 away from 50, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
When dividing 110 by 39, we get 2 with a remainder of 32.
The next digit of our result is 2. 
Result so far: 2191441.2
If we subtract 78 from 110, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
39 goes into 320 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 2191441.28
If we subtract 312 from 320, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
The number 39 fits into 80 2 times, leaving a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2191441.282
The remainder is 2 after subtracting 78 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 12:
39 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 2191441.282
The remainder is 20 after subtracting 0 from 20.
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 13:
When dividing 200 by 39, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 2191441.28205
If we take 195 away from 200, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
When dividing 50 by 39, we get 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 2191441.282051
The remainder is 11 after subtracting 39 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 15:
If we divide 110 by 39, we get 2 and a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 2191441.2820512
The remainder is 32 after subtracting 78 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 16:
39 can be fit into 320 8 times, resulting in a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 2191441.28205128
The remainder is 8 after subtracting 312 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 2191441.28205128 and a remainder of 8e-09.