86355592 ÷ 405 
The aim is to understand the frequency of 405 in 86355592.

Going ahead to step 1:
405 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 405

On to step 2:
405 goes into 86 0 times with a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Include the next digit (3) from the dividend after 86, then repeat: 863 / 405

Advancing to step 3:
405 goes into 863 2 times with a remainder of 53.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 53 after subtracting 810 from 863.
Take the next digit (5) from the dividend and append it to 53, then repeat: 535 / 405

Going ahead to step 4:
535 divided by 405 is 1 with a remainder of 130.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Deduct 405 from 535 and we're left with 130.
Bring next digit (5) of the dividend behind the 130 and repeat the process: 1305 / 405

Step 5:
If we divide 1305 by 405, we get 3 and a remainder of 90.
The next digit of our result is 3. 
Result so far: 213.0
The remainder is 90 after subtracting 1215 from 1305.
Include the next digit (5) from the dividend after 90, then repeat: 905 / 405

Going ahead to step 6:
If we divide 905 by 405, we get 2 and a remainder of 95.
The next digit of our result is 2. 
Result so far: 2132.0
If we subtract 810 from 905, we get 95.
Take the next digit (9) from the dividend and append it to 95, then repeat: 959 / 405

Moving on to step 7:
405 goes into 959 2 times with a remainder of 149.
Put 2 as the next digit of the answer. 
Result so far: 21322.0
If we take 810 away from 959, we end up with 149.
Fetch the next digit (2) from the dividend, attach it to 149 and continue: 1492 / 405

Step 8:
The number 405 fits into 1492 3 times, leaving a remainder of 277.
The number 3 becomes the next digit in our result. 
Result so far: 213223.0
If we take 1215 away from 1492, we end up with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Advancing to step 9:
2770 divided by 405 is 6 with a remainder of 340.
The number 6 becomes the next digit in our result. 
Result so far: 213223.6
Subtract 2430 from 2770 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Let's proceed to step 10:
405 can be fit into 3400 8 times, resulting in a remainder of 160.
The number 8 becomes the next digit in our result. 
Result so far: 213223.68
The remainder is 160 after subtracting 3240 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 11:
405 can be fit into 1600 3 times, resulting in a remainder of 385.
The number 3 becomes the next digit in our result. 
Result so far: 213223.683
If we take 1215 away from 1600, we end up with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Let's proceed to step 12:
If we divide 3850 by 405, we get 9 and a remainder of 205.
Use 9 as the next digit of our solution. 
Result so far: 213223.6839
Subtracting 3645 from 3850 leaves us with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Let's proceed to step 13:
When dividing 2050 by 405, we get 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 213223.68395
Subtracting 2025 from 2050 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 14:
If we divide 250 by 405, we get 0 and a remainder of 250.
Record the quotient 0 as the next digit in the result. 
Result so far: 213223.68395
Subtracting 0 from 250 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.

Going ahead to step 15:
When dividing 2500 by 405, we get 6 with a remainder of 70.
Put 6 as the next digit of the answer. 
Result so far: 213223.6839506
The remainder is 70 after subtracting 2430 from 2500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 16:
When dividing 700 by 405, we get 1 with a remainder of 295.
Write down 1 as next digit of the result. 
Result so far: 213223.68395061
If we take 405 away from 700, we end up with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

The final outcome is 213223.68395061, with a leftover of 2.95e-07.