We look at the division of 76149317 by 405 
The aim is to understand the frequency of 405 in 76149317.

Step 1:
The number 405 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 405

Going ahead to step 2:
405 can be fit into 76 0 times, resulting in a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 76 after subtracting 0 from 76.
Fetch the next digit (1) from the dividend, attach it to 76 and continue: 761 / 405

Going ahead to step 3:
The number 405 fits into 761 1 times, leaving a remainder of 356.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 405 from 761 to get 356.
Fetch the next digit (4) from the dividend, attach it to 356 and continue: 3564 / 405

Step 4:
When dividing 3564 by 405, we get 8 with a remainder of 324.
Use 8 as the next digit of our solution. 
Result so far: 18.0
If we subtract 3240 from 3564, we get 324.
Append the next digit (9) from the dividend to 324 and continue with: 3249 / 405

Advancing to step 5:
When dividing 3249 by 405, we get 8 with a remainder of 9.
The next digit of our result is 8. 
Result so far: 188.0
Deduct 3240 from 3249 and we're left with 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 405

Step 6:
93 divided by 405 is 0 with a remainder of 93.
The number 0 becomes the next digit in our result. 
Result so far: 1880.0
Deduct 0 from 93 and we're left with 93.
Bring next digit (1) of the dividend behind the 93 and repeat the process: 931 / 405

Going ahead to step 7:
When dividing 931 by 405, we get 2 with a remainder of 121.
Put 2 as the next digit of the answer. 
Result so far: 18802.0
Subtract 810 from 931 to get 121.
Bring next digit (7) of the dividend behind the 121 and repeat the process: 1217 / 405

On to step 8:
405 goes into 1217 3 times with a remainder of 2.
The next digit of our result is 3. 
Result so far: 188023.0
Subtracting 1215 from 1217 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
405 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 188023.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
If we divide 200 by 405, we get 0 and a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 188023.0
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 188023.0, with a leftover of 0.2.