We divide 29138246 by 420
The aim is to understand the frequency of 420 in 29138246.

Step 1:
When dividing 2 by 420, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 420

Going ahead to step 2:
29 divided by 420 is 0 with a remainder of 29.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 29, we get 29.
Take the next digit (1) from the dividend and append it to 29, then repeat: 291 / 420

Advancing to step 3:
The number 420 fits into 291 0 times, leaving a remainder of 291.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 291 after subtracting 0 from 291.
Fetch the next digit (3) from the dividend, attach it to 291 and continue: 2913 / 420

Advancing to step 4:
When dividing 2913 by 420, we get 6 with a remainder of 393.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 393 after subtracting 2520 from 2913.
Bring next digit (8) of the dividend behind the 393 and repeat the process: 3938 / 420

Let's proceed to step 5:
3938 divided by 420 is 9 with a remainder of 158.
Put 9 as the next digit of the answer. 
Result so far: 69.0
Subtracting 3780 from 3938 leaves us with 158.
Append the next digit (2) from the dividend to 158 and continue with: 1582 / 420

Let's proceed to step 6:
420 goes into 1582 3 times with a remainder of 322.
The number 3 becomes the next digit in our result. 
Result so far: 693.0
Deduct 1260 from 1582 and we're left with 322.
Take the next digit (4) from the dividend and append it to 322, then repeat: 3224 / 420

On to step 7:
420 can be fit into 3224 7 times, resulting in a remainder of 284.
Put 7 as the next digit of the answer. 
Result so far: 6937.0
Deduct 2940 from 3224 and we're left with 284.
Include the next digit (6) from the dividend after 284, then repeat: 2846 / 420

Advancing to step 8:
The number 420 fits into 2846 6 times, leaving a remainder of 326.
The next digit of our result is 6. 
Result so far: 69376.0
The remainder is 326 after subtracting 2520 from 2846.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Moving on to step 9:
The number 420 fits into 3260 7 times, leaving a remainder of 320.
Write down 7 as next digit of the result. 
Result so far: 69376.7
The remainder is 320 after subtracting 2940 from 3260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 10:
When dividing 3200 by 420, we get 7 with a remainder of 260.
The next digit of our result is 7. 
Result so far: 69376.77
If we subtract 2940 from 3200, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

The final result is 69376.77 with a remainder of 0.26.