Let's divide 83569750 by 660
The aim is to understand the frequency of 660 in 83569750.

Let's proceed to step 1:
When dividing 8 by 660, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 660

Going ahead to step 2:
660 can be fit into 83 0 times, resulting in a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Take the next digit (5) from the dividend and append it to 83, then repeat: 835 / 660

Step 3:
835 divided by 660 is 1 with a remainder of 175.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 175 after subtracting 660 from 835.
Append the next digit (6) from the dividend to 175 and continue with: 1756 / 660

On to step 4:
When dividing 1756 by 660, we get 2 with a remainder of 436.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 1320 from 1756 and we're left with 436.
Include the next digit (9) from the dividend after 436, then repeat: 4369 / 660

Let's proceed to step 5:
660 goes into 4369 6 times with a remainder of 409.
Use 6 as the next digit of our solution. 
Result so far: 126.0
Subtracting 3960 from 4369 leaves us with 409.
Bring next digit (7) of the dividend behind the 409 and repeat the process: 4097 / 660

Let's proceed to step 6:
When dividing 4097 by 660, we get 6 with a remainder of 137.
The number 6 becomes the next digit in our result. 
Result so far: 1266.0
Subtract 3960 from 4097 to get 137.
Include the next digit (5) from the dividend after 137, then repeat: 1375 / 660

Step 7:
660 goes into 1375 2 times with a remainder of 55.
Use 2 as the next digit of our solution. 
Result so far: 12662.0
If we take 1320 away from 1375, we end up with 55.
Include the next digit (0) from the dividend after 55, then repeat: 550 / 660

Advancing to step 8:
The number 660 fits into 550 0 times, leaving a remainder of 550.
The number 0 becomes the next digit in our result. 
Result so far: 126620.0
If we subtract 0 from 550, we get 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Advancing to step 9:
When dividing 5500 by 660, we get 8 with a remainder of 220.
Put 8 as the next digit of the answer. 
Result so far: 126620.8
Subtracting 5280 from 5500 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 10:
If we divide 2200 by 660, we get 3 and a remainder of 220.
Record the quotient 3 as the next digit in the result. 
Result so far: 126620.83
If we take 1980 away from 2200, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 11:
660 goes into 2200 3 times with a remainder of 220.
The number 3 becomes the next digit in our result. 
Result so far: 126620.833
If we take 1980 away from 2200, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

The final outcome is 126620.833, with a leftover of 0.022.