We're dividing 51396687 by 433 
The aim is to understand the frequency of 433 in 51396687.

Advancing to step 1:
The number 433 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 433

Let's proceed to step 2:
If we divide 51 by 433, we get 0 and a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 433

Step 3:
If we divide 513 by 433, we get 1 and a remainder of 80.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 433 away from 513, we end up with 80.
Bring next digit (9) of the dividend behind the 80 and repeat the process: 809 / 433

Step 4:
If we divide 809 by 433, we get 1 and a remainder of 376.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtracting 433 from 809 leaves us with 376.
Bring next digit (6) of the dividend behind the 376 and repeat the process: 3766 / 433

On to step 5:
433 can be fit into 3766 8 times, resulting in a remainder of 302.
Write down 8 as next digit of the result. 
Result so far: 118.0
Deduct 3464 from 3766 and we're left with 302.
Include the next digit (6) from the dividend after 302, then repeat: 3026 / 433

Advancing to step 6:
When dividing 3026 by 433, we get 6 with a remainder of 428.
Write down 6 as next digit of the result. 
Result so far: 1186.0
Deduct 2598 from 3026 and we're left with 428.
Append the next digit (8) from the dividend to 428 and continue with: 4288 / 433

Let's proceed to step 7:
433 goes into 4288 9 times with a remainder of 391.
The number 9 becomes the next digit in our result. 
Result so far: 11869.0
If we take 3897 away from 4288, we end up with 391.
Fetch the next digit (7) from the dividend, attach it to 391 and continue: 3917 / 433

Moving on to step 8:
The number 433 fits into 3917 9 times, leaving a remainder of 20.
The next digit of our result is 9. 
Result so far: 118699.0
If we subtract 3897 from 3917, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
The number 433 fits into 200 0 times, leaving a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 118699.0
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Step 10:
When dividing 2000 by 433, we get 4 with a remainder of 268.
Write down 4 as next digit of the result. 
Result so far: 118699.04
Deduct 1732 from 2000 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

On to step 11:
2680 divided by 433 is 6 with a remainder of 82.
Record the quotient 6 as the next digit in the result. 
Result so far: 118699.046
Subtracting 2598 from 2680 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 12:
The number 433 fits into 820 1 times, leaving a remainder of 387.
The number 1 becomes the next digit in our result. 
Result so far: 118699.0461
If we take 433 away from 820, we end up with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Advancing to step 13:
The number 433 fits into 3870 8 times, leaving a remainder of 406.
Record the quotient 8 as the next digit in the result. 
Result so far: 118699.04618
The remainder is 406 after subtracting 3464 from 3870.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Moving on to step 14:
If we divide 4060 by 433, we get 9 and a remainder of 163.
Use 9 as the next digit of our solution. 
Result so far: 118699.046189
Subtracting 3897 from 4060 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Step 15:
433 can be fit into 1630 3 times, resulting in a remainder of 331.
Write down 3 as next digit of the result. 
Result so far: 118699.0461893
If we take 1299 away from 1630, we end up with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Going ahead to step 16:
When dividing 3310 by 433, we get 7 with a remainder of 279.
Write down 7 as next digit of the result. 
Result so far: 118699.04618937
Subtracting 3031 from 3310 leaves us with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

The final outcome is 118699.04618937, with a leftover of 2.79e-07.