We're dividing 554021 by 42 
The aim is to understand the frequency of 42 in 554021.

Step 1:
42 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 42

Going ahead to step 2:
The number 42 fits into 55 1 times, leaving a remainder of 13.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 42 from 55 and we're left with 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 42

Moving on to step 3:
42 goes into 134 3 times with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtract 126 from 134 to get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 42

On to step 4:
When dividing 80 by 42, we get 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 131.0
Subtracting 42 from 80 leaves us with 38.
Fetch the next digit (2) from the dividend, attach it to 38 and continue: 382 / 42

Moving on to step 5:
42 goes into 382 9 times with a remainder of 4.
Record the quotient 9 as the next digit in the result. 
Result so far: 1319.0
If we take 378 away from 382, we end up with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 42

Let's proceed to step 6:
42 goes into 41 0 times with a remainder of 41.
Put 0 as the next digit of the answer. 
Result so far: 13190.0
Deduct 0 from 41 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 7:
The number 42 fits into 410 9 times, leaving a remainder of 32.
Write down 9 as next digit of the result. 
Result so far: 13190.9
If we subtract 378 from 410, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 8:
320 divided by 42 is 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 13190.97
The remainder is 26 after subtracting 294 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
The number 42 fits into 260 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 13190.976
If we subtract 252 from 260, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
The number 42 fits into 80 1 times, leaving a remainder of 38.
The next digit of our result is 1. 
Result so far: 13190.9761
Subtracting 42 from 80 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 11:
If we divide 380 by 42, we get 9 and a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 13190.97619
If we subtract 378 from 380, we get 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 12:
The number 42 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 13190.97619
Subtracting 0 from 20 leaves us 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.

Going ahead to step 13:
200 divided by 42 is 4 with a remainder of 32.
The next digit of our result is 4. 
Result so far: 13190.9761904
Subtracting 168 from 200 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 14:
When dividing 320 by 42, we get 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 13190.97619047
If we take 294 away from 320, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Our division results in 13190.97619047 with a remaining 2.6e-08.