Let's divide 83931345 by 989
The aim is to understand the frequency of 989 in 83931345.

Advancing to step 1:
The number 989 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 989

Going ahead to step 2:
When dividing 83 by 989, we get 0 with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 83 to get 83.
Grab the next digit (9) from the dividend, add it to 83, then carry on: 839 / 989

On to step 3:
If we divide 839 by 989, we get 0 and a remainder of 839.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 839 and we're left with 839.
Bring next digit (3) of the dividend behind the 839 and repeat the process: 8393 / 989

Moving on to step 4:
If we divide 8393 by 989, we get 8 and a remainder of 481.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 7912 away from 8393, we end up with 481.
Include the next digit (1) from the dividend after 481, then repeat: 4811 / 989

Moving on to step 5:
When dividing 4811 by 989, we get 4 with a remainder of 855.
The number 4 becomes the next digit in our result. 
Result so far: 84.0
Subtract 3956 from 4811 to get 855.
Append the next digit (3) from the dividend to 855 and continue with: 8553 / 989

On to step 6:
The number 989 fits into 8553 8 times, leaving a remainder of 641.
The number 8 becomes the next digit in our result. 
Result so far: 848.0
Deduct 7912 from 8553 and we're left with 641.
Append the next digit (4) from the dividend to 641 and continue with: 6414 / 989

On to step 7:
989 goes into 6414 6 times with a remainder of 480.
Put 6 as the next digit of the answer. 
Result so far: 8486.0
Subtract 5934 from 6414 to get 480.
Fetch the next digit (5) from the dividend, attach it to 480 and continue: 4805 / 989

Going ahead to step 8:
When dividing 4805 by 989, we get 4 with a remainder of 849.
Record the quotient 4 as the next digit in the result. 
Result so far: 84864.0
The remainder is 849 after subtracting 3956 from 4805.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8490, and continue the process.

Advancing to step 9:
The number 989 fits into 8490 8 times, leaving a remainder of 578.
Write down 8 as next digit of the result. 
Result so far: 84864.8
Deduct 7912 from 8490 and we're left with 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

Step 10:
989 goes into 5780 5 times with a remainder of 835.
Write down 5 as next digit of the result. 
Result so far: 84864.85
If we subtract 4945 from 5780, we get 835.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8350, and continue the process.

On to step 11:
989 can be fit into 8350 8 times, resulting in a remainder of 438.
Use 8 as the next digit of our solution. 
Result so far: 84864.858
If we subtract 7912 from 8350, we get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Step 12:
989 goes into 4380 4 times with a remainder of 424.
Record the quotient 4 as the next digit in the result. 
Result so far: 84864.8584
The remainder is 424 after subtracting 3956 from 4380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Moving on to step 13:
989 can be fit into 4240 4 times, resulting in a remainder of 284.
The number 4 becomes the next digit in our result. 
Result so far: 84864.85844
Subtract 3956 from 4240 to get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

The final outcome is 84864.85844, with a leftover of 0.000284.