Let's divide 42893631 by 420
The aim is to understand the frequency of 420 in 42893631.

Going ahead to step 1:
The number 420 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 420

On to step 2:
42 divided by 420 is 0 with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 420

Step 3:
420 can be fit into 428 1 times, resulting in a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 420 from 428 to get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 420

Let's proceed to step 4:
420 can be fit into 89 0 times, resulting in a remainder of 89.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Deduct 0 from 89 and we're left with 89.
Fetch the next digit (3) from the dividend, attach it to 89 and continue: 893 / 420

Going ahead to step 5:
When dividing 893 by 420, we get 2 with a remainder of 53.
Write down 2 as next digit of the result. 
Result so far: 102.0
Subtracting 840 from 893 leaves us with 53.
Append the next digit (6) from the dividend to 53 and continue with: 536 / 420

Step 6:
420 goes into 536 1 times with a remainder of 116.
The next digit of our result is 1. 
Result so far: 1021.0
If we subtract 420 from 536, we get 116.
Fetch the next digit (3) from the dividend, attach it to 116 and continue: 1163 / 420

Advancing to step 7:
When dividing 1163 by 420, we get 2 with a remainder of 323.
Use 2 as the next digit of our solution. 
Result so far: 10212.0
Subtract 840 from 1163 to get 323.
Fetch the next digit (1) from the dividend, attach it to 323 and continue: 3231 / 420

Moving on to step 8:
If we divide 3231 by 420, we get 7 and a remainder of 291.
Write down 7 as next digit of the result. 
Result so far: 102127.0
If we subtract 2940 from 3231, we get 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Moving on to step 9:
420 goes into 2910 6 times with a remainder of 390.
The number 6 becomes the next digit in our result. 
Result so far: 102127.6
If we take 2520 away from 2910, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 10:
3900 divided by 420 is 9 with a remainder of 120.
The number 9 becomes the next digit in our result. 
Result so far: 102127.69
If we take 3780 away from 3900, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 11:
When dividing 1200 by 420, we get 2 with a remainder of 360.
The number 2 becomes the next digit in our result. 
Result so far: 102127.692
Deduct 840 from 1200 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 12:
420 goes into 3600 8 times with a remainder of 240.
Record the quotient 8 as the next digit in the result. 
Result so far: 102127.6928
Deduct 3360 from 3600 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 13:
2400 divided by 420 is 5 with a remainder of 300.
Record the quotient 5 as the next digit in the result. 
Result so far: 102127.69285
Subtracting 2100 from 2400 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 14:
420 can be fit into 3000 7 times, resulting in a remainder of 60.
Put 7 as the next digit of the answer. 
Result so far: 102127.692857
Subtract 2940 from 3000 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 15:
The number 420 fits into 600 1 times, leaving a remainder of 180.
The next digit of our result is 1. 
Result so far: 102127.6928571
If we subtract 420 from 600, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 16:
1800 divided by 420 is 4 with a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 102127.69285714
If we subtract 1680 from 1800, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 102127.69285714 and a remainder of 1.2e-07.