13434985 ÷ 443 
The aim is to understand the frequency of 443 in 13434985.

Advancing to step 1:
443 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 443

Going ahead to step 2:
13 divided by 443 is 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Append the next digit (4) from the dividend to 13 and continue with: 134 / 443

Let's proceed to step 3:
The number 443 fits into 134 0 times, leaving a remainder of 134.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 134 after subtracting 0 from 134.
Bring next digit (3) of the dividend behind the 134 and repeat the process: 1343 / 443

On to step 4:
443 goes into 1343 3 times with a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 14 after subtracting 1329 from 1343.
Grab the next digit (4) from the dividend, add it to 14, then carry on: 144 / 443

Moving on to step 5:
The number 443 fits into 144 0 times, leaving a remainder of 144.
Use 0 as the next digit of our solution. 
Result so far: 30.0
The remainder is 144 after subtracting 0 from 144.
Grab the next digit (9) from the dividend, add it to 144, then carry on: 1449 / 443

Step 6:
If we divide 1449 by 443, we get 3 and a remainder of 120.
Use 3 as the next digit of our solution. 
Result so far: 303.0
If we subtract 1329 from 1449, we get 120.
Grab the next digit (8) from the dividend, add it to 120, then carry on: 1208 / 443

Moving on to step 7:
If we divide 1208 by 443, we get 2 and a remainder of 322.
Record the quotient 2 as the next digit in the result. 
Result so far: 3032.0
Deduct 886 from 1208 and we're left with 322.
Take the next digit (5) from the dividend and append it to 322, then repeat: 3225 / 443

On to step 8:
443 goes into 3225 7 times with a remainder of 124.
Record the quotient 7 as the next digit in the result. 
Result so far: 30327.0
Subtract 3101 from 3225 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 9:
443 can be fit into 1240 2 times, resulting in a remainder of 354.
The next digit of our result is 2. 
Result so far: 30327.2
The remainder is 354 after subtracting 886 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Moving on to step 10:
When dividing 3540 by 443, we get 7 with a remainder of 439.
The number 7 becomes the next digit in our result. 
Result so far: 30327.27
Deduct 3101 from 3540 and we're left with 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Moving on to step 11:
If we divide 4390 by 443, we get 9 and a remainder of 403.
The number 9 becomes the next digit in our result. 
Result so far: 30327.279
The remainder is 403 after subtracting 3987 from 4390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Going ahead to step 12:
If we divide 4030 by 443, we get 9 and a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 30327.2799
Subtracting 3987 from 4030 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final result is 30327.2799 with a remainder of 0.00043.