We look at the division of 64393916 by 413 
The aim is to understand the frequency of 413 in 64393916.

Step 1:
413 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 413

On to step 2:
When dividing 64 by 413, we get 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 413

Moving on to step 3:
If we divide 643 by 413, we get 1 and a remainder of 230.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 413 from 643, we get 230.
Append the next digit (9) from the dividend to 230 and continue with: 2309 / 413

Advancing to step 4:
413 goes into 2309 5 times with a remainder of 244.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtracting 2065 from 2309 leaves us with 244.
Append the next digit (3) from the dividend to 244 and continue with: 2443 / 413

Let's proceed to step 5:
2443 divided by 413 is 5 with a remainder of 378.
The number 5 becomes the next digit in our result. 
Result so far: 155.0
If we take 2065 away from 2443, we end up with 378.
Take the next digit (9) from the dividend and append it to 378, then repeat: 3789 / 413

Moving on to step 6:
If we divide 3789 by 413, we get 9 and a remainder of 72.
The number 9 becomes the next digit in our result. 
Result so far: 1559.0
Subtract 3717 from 3789 to get 72.
Append the next digit (1) from the dividend to 72 and continue with: 721 / 413

Going ahead to step 7:
413 can be fit into 721 1 times, resulting in a remainder of 308.
Put 1 as the next digit of the answer. 
Result so far: 15591.0
If we take 413 away from 721, we end up with 308.
Include the next digit (6) from the dividend after 308, then repeat: 3086 / 413

Moving on to step 8:
413 goes into 3086 7 times with a remainder of 195.
The number 7 becomes the next digit in our result. 
Result so far: 155917.0
If we subtract 2891 from 3086, we 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.

Going ahead to step 9:
If we divide 1950 by 413, we get 4 and a remainder of 298.
The next digit of our result is 4. 
Result so far: 155917.4
Subtract 1652 from 1950 to get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Going ahead to step 10:
When dividing 2980 by 413, we get 7 with a remainder of 89.
Use 7 as the next digit of our solution. 
Result so far: 155917.47
The remainder is 89 after subtracting 2891 from 2980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 11:
The number 413 fits into 890 2 times, leaving a remainder of 64.
The next digit of our result is 2. 
Result so far: 155917.472
Deduct 826 from 890 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 12:
When dividing 640 by 413, we get 1 with a remainder of 227.
Write down 1 as next digit of the result. 
Result so far: 155917.4721
If we take 413 away from 640, we end up with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 13:
When dividing 2270 by 413, we get 5 with a remainder of 205.
Put 5 as the next digit of the answer. 
Result so far: 155917.47215
Subtracting 2065 from 2270 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.

On to step 14:
2050 divided by 413 is 4 with a remainder of 398.
Use 4 as the next digit of our solution. 
Result so far: 155917.472154
The remainder is 398 after subtracting 1652 from 2050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 15:
413 goes into 3980 9 times with a remainder of 263.
Use 9 as the next digit of our solution. 
Result so far: 155917.4721549
Subtract 3717 from 3980 to get 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Going ahead to step 16:
413 goes into 2630 6 times with a remainder of 152.
Record the quotient 6 as the next digit in the result. 
Result so far: 155917.47215496
If we take 2478 away from 2630, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

The final outcome is 155917.47215496, with a leftover of 1.52e-07.