668869 ÷ 43 
The aim is to understand the frequency of 43 in 668869.

Going ahead to step 1:
43 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 43

Let's proceed to step 2:
43 goes into 66 1 times with a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 43 from 66, we get 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 43

Going ahead to step 3:
43 can be fit into 238 5 times, resulting in a remainder of 23.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtract 215 from 238 to get 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 43

Let's proceed to step 4:
When dividing 238 by 43, we get 5 with a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 155.0
Subtracting 215 from 238 leaves us with 23.
Append the next digit (6) from the dividend to 23 and continue with: 236 / 43

Let's proceed to step 5:
The number 43 fits into 236 5 times, leaving a remainder of 21.
Use 5 as the next digit of our solution. 
Result so far: 1555.0
Subtracting 215 from 236 leaves us with 21.
Bring next digit (9) of the dividend behind the 21 and repeat the process: 219 / 43

Let's proceed to step 6:
43 can be fit into 219 5 times, resulting in a remainder of 4.
The next digit of our result is 5. 
Result so far: 15555.0
Subtract 215 from 219 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
40 divided by 43 is 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 15555.0
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 8:
43 can be fit into 400 9 times, resulting in a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 15555.09
If we take 387 away from 400, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
If we divide 130 by 43, we get 3 and a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 15555.093
Subtract 129 from 130 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 10:
If we divide 10 by 43, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 15555.093
If we take 0 away from 10, we end up 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.

On to step 11:
43 can be fit into 100 2 times, resulting in a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 15555.09302
Subtracting 86 from 100 leaves us 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.

Advancing to step 12:
The number 43 fits into 140 3 times, leaving a remainder of 11.
The next digit of our result is 3. 
Result so far: 15555.093023
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.

Let's proceed to step 13:
110 divided by 43 is 2 with a remainder of 24.
Write down 2 as next digit of the result. 
Result so far: 15555.0930232
Subtract 86 from 110 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 14:
43 can be fit into 240 5 times, resulting in a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 15555.09302325
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.

After the division, we end up with 15555.09302325 and a remainder of 2.5e-08.