Let's divide 31680035 by 987
The aim is to understand the frequency of 987 in 31680035.

Advancing to step 1:
The number 987 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 987

Moving on to step 2:
The number 987 fits into 31 0 times, leaving a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Fetch the next digit (6) from the dividend, attach it to 31 and continue: 316 / 987

Step 3:
987 can be fit into 316 0 times, resulting in a remainder of 316.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 316 after subtracting 0 from 316.
Grab the next digit (8) from the dividend, add it to 316, then carry on: 3168 / 987

Moving on to step 4:
When dividing 3168 by 987, we get 3 with a remainder of 207.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 2961 from 3168 to get 207.
Append the next digit (0) from the dividend to 207 and continue with: 2070 / 987

Moving on to step 5:
987 can be fit into 2070 2 times, resulting in a remainder of 96.
Use 2 as the next digit of our solution. 
Result so far: 32.0
Subtract 1974 from 2070 to get 96.
Take the next digit (0) from the dividend and append it to 96, then repeat: 960 / 987

Moving on to step 6:
987 goes into 960 0 times with a remainder of 960.
Write down 0 as next digit of the result. 
Result so far: 320.0
Deduct 0 from 960 and we're left with 960.
Take the next digit (3) from the dividend and append it to 960, then repeat: 9603 / 987

Moving on to step 7:
If we divide 9603 by 987, we get 9 and a remainder of 720.
The next digit of our result is 9. 
Result so far: 3209.0
The remainder is 720 after subtracting 8883 from 9603.
Take the next digit (5) from the dividend and append it to 720, then repeat: 7205 / 987

Going ahead to step 8:
987 can be fit into 7205 7 times, resulting in a remainder of 296.
The next digit of our result is 7. 
Result so far: 32097.0
If we subtract 6909 from 7205, we get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Advancing to step 9:
2960 divided by 987 is 2 with a remainder of 986.
Use 2 as the next digit of our solution. 
Result so far: 32097.2
If we subtract 1974 from 2960, we get 986.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9860, and continue the process.

Let's proceed to step 10:
When dividing 9860 by 987, we get 9 with a remainder of 977.
Put 9 as the next digit of the answer. 
Result so far: 32097.29
If we take 8883 away from 9860, we end up with 977.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9770, and continue the process.

On to step 11:
When dividing 9770 by 987, we get 9 with a remainder of 887.
The next digit of our result is 9. 
Result so far: 32097.299
Subtract 8883 from 9770 to get 887.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8870, and continue the process.

The final result is 32097.299 with a remainder of 0.0887.