We look at the division of 76439193 by 407 
The aim is to understand the frequency of 407 in 76439193.

Let's proceed to step 1:
407 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 407

Let's proceed to step 2:
The number 407 fits into 76 0 times, leaving a remainder of 76.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 76 to get 76.
Bring next digit (4) of the dividend behind the 76 and repeat the process: 764 / 407

Step 3:
407 can be fit into 764 1 times, resulting in a remainder of 357.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 407 from 764 leaves us with 357.
Grab the next digit (3) from the dividend, add it to 357, then carry on: 3573 / 407

Moving on to step 4:
The number 407 fits into 3573 8 times, leaving a remainder of 317.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 3256 from 3573 to get 317.
Append the next digit (9) from the dividend to 317 and continue with: 3179 / 407

Moving on to step 5:
407 goes into 3179 7 times with a remainder of 330.
The number 7 becomes the next digit in our result. 
Result so far: 187.0
The remainder is 330 after subtracting 2849 from 3179.
Bring next digit (1) of the dividend behind the 330 and repeat the process: 3301 / 407

Moving on to step 6:
The number 407 fits into 3301 8 times, leaving a remainder of 45.
The next digit of our result is 8. 
Result so far: 1878.0
Subtracting 3256 from 3301 leaves us with 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 407

Moving on to step 7:
407 can be fit into 459 1 times, resulting in a remainder of 52.
The next digit of our result is 1. 
Result so far: 18781.0
If we take 407 away from 459, we end up with 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 407

Advancing to step 8:
407 goes into 523 1 times with a remainder of 116.
Put 1 as the next digit of the answer. 
Result so far: 187811.0
Subtract 407 from 523 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 9:
If we divide 1160 by 407, we get 2 and a remainder of 346.
Record the quotient 2 as the next digit in the result. 
Result so far: 187811.2
Deduct 814 from 1160 and we're left with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 10:
407 goes into 3460 8 times with a remainder of 204.
Use 8 as the next digit of our solution. 
Result so far: 187811.28
If we take 3256 away from 3460, we end up with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

On to step 11:
If we divide 2040 by 407, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 187811.285
If we take 2035 away from 2040, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 12:
407 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 187811.285
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 13:
The number 407 fits into 500 1 times, leaving a remainder of 93.
Put 1 as the next digit of the answer. 
Result so far: 187811.28501
The remainder is 93 after subtracting 407 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Advancing to step 14:
If we divide 930 by 407, we get 2 and a remainder of 116.
Use 2 as the next digit of our solution. 
Result so far: 187811.285012
If we take 814 away from 930, we end up with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Advancing to step 15:
1160 divided by 407 is 2 with a remainder of 346.
The number 2 becomes the next digit in our result. 
Result so far: 187811.2850122
If we subtract 814 from 1160, we get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

The final outcome is 187811.2850122, with a leftover of 3.46e-06.