We look at the division of 86338137 by 412 
The aim is to understand the frequency of 412 in 86338137.

On to step 1:
When dividing 8 by 412, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 412

Moving on to step 2:
86 divided by 412 is 0 with a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Append the next digit (3) from the dividend to 86 and continue with: 863 / 412

Step 3:
The number 412 fits into 863 2 times, leaving a remainder of 39.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 824 from 863 and we're left with 39.
Bring next digit (3) of the dividend behind the 39 and repeat the process: 393 / 412

Step 4:
If we divide 393 by 412, we get 0 and a remainder of 393.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Deduct 0 from 393 and we're left with 393.
Bring next digit (8) of the dividend behind the 393 and repeat the process: 3938 / 412

Let's proceed to step 5:
If we divide 3938 by 412, we get 9 and a remainder of 230.
Use 9 as the next digit of our solution. 
Result so far: 209.0
Subtracting 3708 from 3938 leaves us with 230.
Bring next digit (1) of the dividend behind the 230 and repeat the process: 2301 / 412

Let's proceed to step 6:
The number 412 fits into 2301 5 times, leaving a remainder of 241.
Use 5 as the next digit of our solution. 
Result so far: 2095.0
Deduct 2060 from 2301 and we're left with 241.
Take the next digit (3) from the dividend and append it to 241, then repeat: 2413 / 412

Step 7:
412 can be fit into 2413 5 times, resulting in a remainder of 353.
Put 5 as the next digit of the answer. 
Result so far: 20955.0
Subtracting 2060 from 2413 leaves us with 353.
Fetch the next digit (7) from the dividend, attach it to 353 and continue: 3537 / 412

Let's proceed to step 8:
412 goes into 3537 8 times with a remainder of 241.
The number 8 becomes the next digit in our result. 
Result so far: 209558.0
The remainder is 241 after subtracting 3296 from 3537.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Advancing to step 9:
The number 412 fits into 2410 5 times, leaving a remainder of 350.
Write down 5 as next digit of the result. 
Result so far: 209558.5
Subtract 2060 from 2410 to get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 10:
412 goes into 3500 8 times with a remainder of 204.
Record the quotient 8 as the next digit in the result. 
Result so far: 209558.58
Subtracting 3296 from 3500 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 11:
The number 412 fits into 2040 4 times, leaving a remainder of 392.
Use 4 as the next digit of our solution. 
Result so far: 209558.584
If we subtract 1648 from 2040, we get 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Advancing to step 12:
The number 412 fits into 3920 9 times, leaving a remainder of 212.
Record the quotient 9 as the next digit in the result. 
Result so far: 209558.5849
Subtracting 3708 from 3920 leaves us with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Advancing to step 13:
The number 412 fits into 2120 5 times, leaving a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 209558.58495
Deduct 2060 from 2120 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 14:
If we divide 600 by 412, we get 1 and a remainder of 188.
Put 1 as the next digit of the answer. 
Result so far: 209558.584951
If we take 412 away from 600, we end up with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Let's proceed to step 15:
1880 divided by 412 is 4 with a remainder of 232.
Put 4 as the next digit of the answer. 
Result so far: 209558.5849514
If we subtract 1648 from 1880, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Going ahead to step 16:
412 goes into 2320 5 times with a remainder of 260.
Put 5 as the next digit of the answer. 
Result so far: 209558.58495145
Deduct 2060 from 2320 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

The final outcome is 209558.58495145, with a leftover of 2.6e-07.