We look at the division of 63336633 by 405 
The aim is to understand the frequency of 405 in 63336633.

Step 1:
405 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 405

Advancing to step 2:
405 can be fit into 63 0 times, resulting in a remainder of 63.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Include the next digit (3) from the dividend after 63, then repeat: 633 / 405

Let's proceed to step 3:
The number 405 fits into 633 1 times, leaving a remainder of 228.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 405 away from 633, we end up with 228.
Fetch the next digit (3) from the dividend, attach it to 228 and continue: 2283 / 405

Advancing to step 4:
405 can be fit into 2283 5 times, resulting in a remainder of 258.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Deduct 2025 from 2283 and we're left with 258.
Take the next digit (6) from the dividend and append it to 258, then repeat: 2586 / 405

Let's proceed to step 5:
The number 405 fits into 2586 6 times, leaving a remainder of 156.
The number 6 becomes the next digit in our result. 
Result so far: 156.0
If we take 2430 away from 2586, we end up with 156.
Bring next digit (6) of the dividend behind the 156 and repeat the process: 1566 / 405

Let's proceed to step 6:
405 can be fit into 1566 3 times, resulting in a remainder of 351.
Use 3 as the next digit of our solution. 
Result so far: 1563.0
If we take 1215 away from 1566, we end up with 351.
Fetch the next digit (3) from the dividend, attach it to 351 and continue: 3513 / 405

Step 7:
When dividing 3513 by 405, we get 8 with a remainder of 273.
Write down 8 as next digit of the result. 
Result so far: 15638.0
Subtract 3240 from 3513 to get 273.
Grab the next digit (3) from the dividend, add it to 273, then carry on: 2733 / 405

Going ahead to step 8:
The number 405 fits into 2733 6 times, leaving a remainder of 303.
Use 6 as the next digit of our solution. 
Result so far: 156386.0
If we subtract 2430 from 2733, we get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Moving on to step 9:
3030 divided by 405 is 7 with a remainder of 195.
The next digit of our result is 7. 
Result so far: 156386.7
The remainder is 195 after subtracting 2835 from 3030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Let's proceed to step 10:
When dividing 1950 by 405, we get 4 with a remainder of 330.
Put 4 as the next digit of the answer. 
Result so far: 156386.74
If we take 1620 away from 1950, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 11:
3300 divided by 405 is 8 with a remainder of 60.
Record the quotient 8 as the next digit in the result. 
Result so far: 156386.748
The remainder is 60 after subtracting 3240 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 12:
If we divide 600 by 405, we get 1 and a remainder of 195.
The next digit of our result is 1. 
Result so far: 156386.7481
The remainder is 195 after subtracting 405 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Advancing to step 13:
The number 405 fits into 1950 4 times, leaving a remainder of 330.
Use 4 as the next digit of our solution. 
Result so far: 156386.74814
Deduct 1620 from 1950 and we're left with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 14:
If we divide 3300 by 405, we get 8 and a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 156386.748148
The remainder is 60 after subtracting 3240 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 15:
405 goes into 600 1 times with a remainder of 195.
Use 1 as the next digit of our solution. 
Result so far: 156386.7481481
Subtract 405 from 600 to get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

On to step 16:
405 goes into 1950 4 times with a remainder of 330.
Write down 4 as next digit of the result. 
Result so far: 156386.74814814
If we take 1620 away from 1950, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

After the division, we end up with 156386.74814814 and a remainder of 3.3e-07.