We look at the division of 18242661 by 405 
The aim is to understand the frequency of 405 in 18242661.

Moving on to step 1:
If we divide 1 by 405, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 405

Advancing to step 2:
If we divide 18 by 405, we get 0 and a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Bring next digit (2) of the dividend behind the 18 and repeat the process: 182 / 405

Advancing to step 3:
405 goes into 182 0 times with a remainder of 182.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 182, we get 182.
Grab the next digit (4) from the dividend, add it to 182, then carry on: 1824 / 405

Going ahead to step 4:
The number 405 fits into 1824 4 times, leaving a remainder of 204.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 1620 away from 1824, we end up with 204.
Include the next digit (2) from the dividend after 204, then repeat: 2042 / 405

Going ahead to step 5:
The number 405 fits into 2042 5 times, leaving a remainder of 17.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Deduct 2025 from 2042 and we're left with 17.
Grab the next digit (6) from the dividend, add it to 17, then carry on: 176 / 405

Let's proceed to step 6:
176 divided by 405 is 0 with a remainder of 176.
Use 0 as the next digit of our solution. 
Result so far: 450.0
The remainder is 176 after subtracting 0 from 176.
Take the next digit (6) from the dividend and append it to 176, then repeat: 1766 / 405

Moving on to step 7:
405 goes into 1766 4 times with a remainder of 146.
Use 4 as the next digit of our solution. 
Result so far: 4504.0
Deduct 1620 from 1766 and we're left with 146.
Append the next digit (1) from the dividend to 146 and continue with: 1461 / 405

On to step 8:
When dividing 1461 by 405, we get 3 with a remainder of 246.
Use 3 as the next digit of our solution. 
Result so far: 45043.0
The remainder is 246 after subtracting 1215 from 1461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Step 9:
405 goes into 2460 6 times with a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 45043.6
Deduct 2430 from 2460 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
If we divide 300 by 405, we get 0 and a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 45043.6
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 11:
405 goes into 3000 7 times with a remainder of 165.
Record the quotient 7 as the next digit in the result. 
Result so far: 45043.607
Subtract 2835 from 3000 to get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 12:
The number 405 fits into 1650 4 times, leaving a remainder of 30.
The next digit of our result is 4. 
Result so far: 45043.6074
The remainder is 30 after subtracting 1620 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 13:
405 can be fit into 300 0 times, resulting in a remainder of 300.
The next digit of our result is 0. 
Result so far: 45043.6074
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 14:
405 can be fit into 3000 7 times, resulting in a remainder of 165.
The next digit of our result is 7. 
Result so far: 45043.607407
Deduct 2835 from 3000 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 15:
The number 405 fits into 1650 4 times, leaving a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 45043.6074074
Deduct 1620 from 1650 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 16:
When dividing 300 by 405, we get 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 45043.6074074
The remainder is 300 after subtracting 0 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

In conclusion, the division gives 45043.6074074 with a balance of 3e-07.