We're dividing 54232130 by 407 
The aim is to understand the frequency of 407 in 54232130.

On to step 1:
407 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 407

Let's proceed to step 2:
407 can be fit into 54 0 times, resulting in a remainder of 54.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 54 after subtracting 0 from 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 407

On to step 3:
542 divided by 407 is 1 with a remainder of 135.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 407 from 542 and we're left with 135.
Grab the next digit (3) from the dividend, add it to 135, then carry on: 1353 / 407

On to step 4:
407 goes into 1353 3 times with a remainder of 132.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 1221 from 1353, we get 132.
Take the next digit (2) from the dividend and append it to 132, then repeat: 1322 / 407

Step 5:
407 goes into 1322 3 times with a remainder of 101.
Use 3 as the next digit of our solution. 
Result so far: 133.0
If we take 1221 away from 1322, we end up with 101.
Include the next digit (1) from the dividend after 101, then repeat: 1011 / 407

Going ahead to step 6:
1011 divided by 407 is 2 with a remainder of 197.
The number 2 becomes the next digit in our result. 
Result so far: 1332.0
The remainder is 197 after subtracting 814 from 1011.
Take the next digit (3) from the dividend and append it to 197, then repeat: 1973 / 407

Advancing to step 7:
407 goes into 1973 4 times with a remainder of 345.
Record the quotient 4 as the next digit in the result. 
Result so far: 13324.0
Deduct 1628 from 1973 and we're left with 345.
Bring next digit (0) of the dividend behind the 345 and repeat the process: 3450 / 407

Going ahead to step 8:
407 goes into 3450 8 times with a remainder of 194.
The next digit of our result is 8. 
Result so far: 133248.0
Subtracting 3256 from 3450 leaves us with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Let's proceed to step 9:
When dividing 1940 by 407, we get 4 with a remainder of 312.
Write down 4 as next digit of the result. 
Result so far: 133248.4
Deduct 1628 from 1940 and we're left with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 10:
407 can be fit into 3120 7 times, resulting in a remainder of 271.
Record the quotient 7 as the next digit in the result. 
Result so far: 133248.47
Deduct 2849 from 3120 and we're left with 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Step 11:
The number 407 fits into 2710 6 times, leaving a remainder of 268.
Write down 6 as next digit of the result. 
Result so far: 133248.476
If we take 2442 away from 2710, we end up 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.

Step 12:
If we divide 2680 by 407, we get 6 and a remainder of 238.
The next digit of our result is 6. 
Result so far: 133248.4766
If we take 2442 away from 2680, we end up with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

After the division, we end up with 133248.4766 and a remainder of 0.00238.