We look at the division of 43686073 by 997 
The aim is to understand the frequency of 997 in 43686073.

Going ahead to step 1:
When dividing 4 by 997, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 997

Going ahead to step 2:
43 divided by 997 is 0 with a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Grab the next digit (6) from the dividend, add it to 43, then carry on: 436 / 997

On to step 3:
436 divided by 997 is 0 with a remainder of 436.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 436 and we're left with 436.
Include the next digit (8) from the dividend after 436, then repeat: 4368 / 997

Going ahead to step 4:
If we divide 4368 by 997, we get 4 and a remainder of 380.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 3988 from 4368 and we're left with 380.
Grab the next digit (6) from the dividend, add it to 380, then carry on: 3806 / 997

Advancing to step 5:
If we divide 3806 by 997, we get 3 and a remainder of 815.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we subtract 2991 from 3806, we get 815.
Include the next digit (0) from the dividend after 815, then repeat: 8150 / 997

Let's proceed to step 6:
997 can be fit into 8150 8 times, resulting in a remainder of 174.
The next digit of our result is 8. 
Result so far: 438.0
Subtract 7976 from 8150 to get 174.
Grab the next digit (7) from the dividend, add it to 174, then carry on: 1747 / 997

Going ahead to step 7:
The number 997 fits into 1747 1 times, leaving a remainder of 750.
Record the quotient 1 as the next digit in the result. 
Result so far: 4381.0
Subtracting 997 from 1747 leaves us with 750.
Take the next digit (3) from the dividend and append it to 750, then repeat: 7503 / 997

On to step 8:
The number 997 fits into 7503 7 times, leaving a remainder of 524.
Write down 7 as next digit of the result. 
Result so far: 43817.0
If we take 6979 away from 7503, we end up with 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

On to step 9:
997 goes into 5240 5 times with a remainder of 255.
Write down 5 as next digit of the result. 
Result so far: 43817.5
The remainder is 255 after subtracting 4985 from 5240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Going ahead to step 10:
997 can be fit into 2550 2 times, resulting in a remainder of 556.
The number 2 becomes the next digit in our result. 
Result so far: 43817.52
The remainder is 556 after subtracting 1994 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Going ahead to step 11:
The number 997 fits into 5560 5 times, leaving a remainder of 575.
Put 5 as the next digit of the answer. 
Result so far: 43817.525
Deduct 4985 from 5560 and we're left with 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

On to step 12:
When dividing 5750 by 997, we get 5 with a remainder of 765.
Use 5 as the next digit of our solution. 
Result so far: 43817.5255
Subtracting 4985 from 5750 leaves us with 765.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

The final outcome is 43817.5255, with a leftover of 0.00765.