86590568 ÷ 412 
The aim is to understand the frequency of 412 in 86590568.

Let's proceed to step 1:
If we divide 8 by 412, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 412

Let's proceed to step 2:
If we divide 86 by 412, we get 0 and a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Take the next digit (5) from the dividend and append it to 86, then repeat: 865 / 412

Step 3:
412 goes into 865 2 times with a remainder of 41.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 41 after subtracting 824 from 865.
Append the next digit (9) from the dividend to 41 and continue with: 419 / 412

Step 4:
The number 412 fits into 419 1 times, leaving a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 412 from 419 leaves us with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 412

On to step 5:
If we divide 70 by 412, we get 0 and a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 210.0
If we subtract 0 from 70, we get 70.
Take the next digit (5) from the dividend and append it to 70, then repeat: 705 / 412

Let's proceed to step 6:
The number 412 fits into 705 1 times, leaving a remainder of 293.
The number 1 becomes the next digit in our result. 
Result so far: 2101.0
If we take 412 away from 705, we end up with 293.
Take the next digit (6) from the dividend and append it to 293, then repeat: 2936 / 412

Going ahead to step 7:
2936 divided by 412 is 7 with a remainder of 52.
The next digit of our result is 7. 
Result so far: 21017.0
Subtract 2884 from 2936 to get 52.
Bring next digit (8) of the dividend behind the 52 and repeat the process: 528 / 412

Let's proceed to step 8:
If we divide 528 by 412, we get 1 and a remainder of 116.
The next digit of our result is 1. 
Result so far: 210171.0
Subtracting 412 from 528 leaves us with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Advancing to step 9:
1160 divided by 412 is 2 with a remainder of 336.
Record the quotient 2 as the next digit in the result. 
Result so far: 210171.2
If we subtract 824 from 1160, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Let's proceed to step 10:
412 goes into 3360 8 times with a remainder of 64.
The number 8 becomes the next digit in our result. 
Result so far: 210171.28
Subtract 3296 from 3360 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 11:
640 divided by 412 is 1 with a remainder of 228.
Put 1 as the next digit of the answer. 
Result so far: 210171.281
The remainder is 228 after subtracting 412 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 12:
If we divide 2280 by 412, we get 5 and a remainder of 220.
Use 5 as the next digit of our solution. 
Result so far: 210171.2815
Subtract 2060 from 2280 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Moving on to step 13:
When dividing 2200 by 412, we get 5 with a remainder of 140.
Use 5 as the next digit of our solution. 
Result so far: 210171.28155
The remainder is 140 after subtracting 2060 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final outcome is 210171.28155, with a leftover of 0.00014.