We divide 15990158 by 412
The aim is to understand the frequency of 412 in 15990158.

Let's proceed to step 1:
When dividing 1 by 412, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 412

Moving on to step 2:
When dividing 15 by 412, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 412

Advancing to step 3:
412 can be fit into 159 0 times, resulting in a remainder of 159.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 159 after subtracting 0 from 159.
Append the next digit (9) from the dividend to 159 and continue with: 1599 / 412

Going ahead to step 4:
The number 412 fits into 1599 3 times, leaving a remainder of 363.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 1236 from 1599 leaves us with 363.
Take the next digit (0) from the dividend and append it to 363, then repeat: 3630 / 412

Advancing to step 5:
When dividing 3630 by 412, we get 8 with a remainder of 334.
Use 8 as the next digit of our solution. 
Result so far: 38.0
If we take 3296 away from 3630, we end up with 334.
Fetch the next digit (1) from the dividend, attach it to 334 and continue: 3341 / 412

Going ahead to step 6:
If we divide 3341 by 412, we get 8 and a remainder of 45.
Write down 8 as next digit of the result. 
Result so far: 388.0
The remainder is 45 after subtracting 3296 from 3341.
Fetch the next digit (5) from the dividend, attach it to 45 and continue: 455 / 412

On to step 7:
The number 412 fits into 455 1 times, leaving a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 3881.0
If we take 412 away from 455, we end up with 43.
Fetch the next digit (8) from the dividend, attach it to 43 and continue: 438 / 412

Advancing to step 8:
The number 412 fits into 438 1 times, leaving a remainder of 26.
The next digit of our result is 1. 
Result so far: 38811.0
Subtracting 412 from 438 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
412 goes into 260 0 times with a remainder of 260.
The next digit of our result is 0. 
Result so far: 38811.0
Subtract 0 from 260 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 10:
412 can be fit into 2600 6 times, resulting in a remainder of 128.
Write down 6 as next digit of the result. 
Result so far: 38811.06
If we take 2472 away from 2600, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 11:
412 can be fit into 1280 3 times, resulting in a remainder of 44.
Write down 3 as next digit of the result. 
Result so far: 38811.063
Deduct 1236 from 1280 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 12:
412 goes into 440 1 times with a remainder of 28.
Put 1 as the next digit of the answer. 
Result so far: 38811.0631
Deduct 412 from 440 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 13:
When dividing 280 by 412, we get 0 with a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 38811.0631
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 14:
412 goes into 2800 6 times with a remainder of 328.
Record the quotient 6 as the next digit in the result. 
Result so far: 38811.063106
If we take 2472 away from 2800, we end up with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Advancing to step 15:
If we divide 3280 by 412, we get 7 and a remainder of 396.
Record the quotient 7 as the next digit in the result. 
Result so far: 38811.0631067
Deduct 2884 from 3280 and we're left with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Advancing to step 16:
412 can be fit into 3960 9 times, resulting in a remainder of 252.
The next digit of our result is 9. 
Result so far: 38811.06310679
Subtracting 3708 from 3960 leaves us with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

The final outcome is 38811.06310679, with a leftover of 2.52e-07.