We're dividing 18866120 by 443 
The aim is to understand the frequency of 443 in 18866120.

Step 1:
The number 443 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 443

Going ahead to step 2:
443 can be fit into 18 0 times, resulting in a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 443

Going ahead to step 3:
188 divided by 443 is 0 with a remainder of 188.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 188 after subtracting 0 from 188.
Grab the next digit (6) from the dividend, add it to 188, then carry on: 1886 / 443

Moving on to step 4:
If we divide 1886 by 443, we get 4 and a remainder of 114.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 1772 away from 1886, we end up with 114.
Fetch the next digit (6) from the dividend, attach it to 114 and continue: 1146 / 443

Step 5:
443 goes into 1146 2 times with a remainder of 260.
Use 2 as the next digit of our solution. 
Result so far: 42.0
The remainder is 260 after subtracting 886 from 1146.
Append the next digit (1) from the dividend to 260 and continue with: 2601 / 443

On to step 6:
If we divide 2601 by 443, we get 5 and a remainder of 386.
The next digit of our result is 5. 
Result so far: 425.0
If we take 2215 away from 2601, we end up with 386.
Bring next digit (2) of the dividend behind the 386 and repeat the process: 3862 / 443

Step 7:
The number 443 fits into 3862 8 times, leaving a remainder of 318.
Write down 8 as next digit of the result. 
Result so far: 4258.0
If we subtract 3544 from 3862, we get 318.
Take the next digit (0) from the dividend and append it to 318, then repeat: 3180 / 443

On to step 8:
443 goes into 3180 7 times with a remainder of 79.
Write down 7 as next digit of the result. 
Result so far: 42587.0
Deduct 3101 from 3180 and we're left with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 9:
443 goes into 790 1 times with a remainder of 347.
The number 1 becomes the next digit in our result. 
Result so far: 42587.1
The remainder is 347 after subtracting 443 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Step 10:
If we divide 3470 by 443, we get 7 and a remainder of 369.
The number 7 becomes the next digit in our result. 
Result so far: 42587.17
Subtracting 3101 from 3470 leaves us with 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

Advancing to step 11:
3690 divided by 443 is 8 with a remainder of 146.
Put 8 as the next digit of the answer. 
Result so far: 42587.178
Deduct 3544 from 3690 and we're left with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

On to step 12:
443 goes into 1460 3 times with a remainder of 131.
Use 3 as the next digit of our solution. 
Result so far: 42587.1783
Subtracting 1329 from 1460 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Moving on to step 13:
443 can be fit into 1310 2 times, resulting in a remainder of 424.
The number 2 becomes the next digit in our result. 
Result so far: 42587.17832
Subtracting 886 from 1310 leaves us with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

On to step 14:
When dividing 4240 by 443, we get 9 with a remainder of 253.
The next digit of our result is 9. 
Result so far: 42587.178329
If we subtract 3987 from 4240, we get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Moving on to step 15:
When dividing 2530 by 443, we get 5 with a remainder of 315.
The number 5 becomes the next digit in our result. 
Result so far: 42587.1783295
If we take 2215 away from 2530, we end up with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Going ahead to step 16:
443 goes into 3150 7 times with a remainder of 49.
The number 7 becomes the next digit in our result. 
Result so far: 42587.17832957
Deduct 3101 from 3150 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

The quotient of the division is 42587.17832957, and the remainder is 4.9e-08.