We look at the division of 583899 by 429 
The aim is to understand the frequency of 429 in 583899.

Moving on to step 1:
The number 429 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 429

Advancing to step 2:
429 can be fit into 58 0 times, resulting in a remainder of 58.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 58, we get 58.
Take the next digit (3) from the dividend and append it to 58, then repeat: 583 / 429

Step 3:
429 can be fit into 583 1 times, resulting in a remainder of 154.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 429 from 583 leaves us with 154.
Take the next digit (8) from the dividend and append it to 154, then repeat: 1548 / 429

Step 4:
If we divide 1548 by 429, we get 3 and a remainder of 261.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we subtract 1287 from 1548, we get 261.
Append the next digit (9) from the dividend to 261 and continue with: 2619 / 429

Moving on to step 5:
When dividing 2619 by 429, we get 6 with a remainder of 45.
Use 6 as the next digit of our solution. 
Result so far: 136.0
Deduct 2574 from 2619 and we're left with 45.
Bring next digit (9) of the dividend behind the 45 and repeat the process: 459 / 429

Step 6:
If we divide 459 by 429, we get 1 and a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 1361.0
If we take 429 away from 459, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
The number 429 fits into 300 0 times, leaving a remainder of 300.
The next digit of our result is 0. 
Result so far: 1361.0
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Going ahead to step 8:
When dividing 3000 by 429, we get 6 with a remainder of 426.
Record the quotient 6 as the next digit in the result. 
Result so far: 1361.06
Subtracting 2574 from 3000 leaves us with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Step 9:
If we divide 4260 by 429, we get 9 and a remainder of 399.
Record the quotient 9 as the next digit in the result. 
Result so far: 1361.069
Subtract 3861 from 4260 to get 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Going ahead to step 10:
If we divide 3990 by 429, we get 9 and a remainder of 129.
Put 9 as the next digit of the answer. 
Result so far: 1361.0699
Subtracting 3861 from 3990 leaves us with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

The quotient of the division is 1361.0699, and the remainder is 0.00129.