987290 ÷ 43 
The aim is to understand the frequency of 43 in 987290.

On to step 1:
The number 43 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 43

On to step 2:
If we divide 98 by 43, we get 2 and a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 86 from 98 to get 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 43

Advancing to step 3:
The number 43 fits into 127 2 times, leaving a remainder of 41.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
The remainder is 41 after subtracting 86 from 127.
Bring next digit (2) of the dividend behind the 41 and repeat the process: 412 / 43

Advancing to step 4:
43 goes into 412 9 times with a remainder of 25.
Use 9 as the next digit of our solution. 
Result so far: 229.0
The remainder is 25 after subtracting 387 from 412.
Fetch the next digit (9) from the dividend, attach it to 25 and continue: 259 / 43

Going ahead to step 5:
If we divide 259 by 43, we get 6 and a remainder of 1.
The next digit of our result is 6. 
Result so far: 2296.0
Subtracting 258 from 259 leaves us with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 43

Advancing to step 6:
43 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 22960.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
If we divide 100 by 43, we get 2 and a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 22960.2
Deduct 86 from 100 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 8:
43 goes into 140 3 times with a remainder of 11.
The next digit of our result is 3. 
Result so far: 22960.23
If we take 129 away from 140, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 9:
43 can be fit into 110 2 times, resulting in a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 22960.232
If we take 86 away from 110, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
43 goes into 240 5 times with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 22960.2325
Subtracting 215 from 240 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
250 divided by 43 is 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 22960.23255
Deduct 215 from 250 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 22960.23255, with a leftover of 3.5e-05.