Let's divide 66623351 by 869
The aim is to understand the frequency of 869 in 66623351.

Step 1:
If we divide 6 by 869, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 869

Let's proceed to step 2:
If we divide 66 by 869, we get 0 and a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Fetch the next digit (6) from the dividend, attach it to 66 and continue: 666 / 869

Advancing to step 3:
869 can be fit into 666 0 times, resulting in a remainder of 666.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 666, we get 666.
Grab the next digit (2) from the dividend, add it to 666, then carry on: 6662 / 869

Going ahead to step 4:
869 goes into 6662 7 times with a remainder of 579.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 6083 from 6662 leaves us with 579.
Append the next digit (3) from the dividend to 579 and continue with: 5793 / 869

Moving on to step 5:
When dividing 5793 by 869, we get 6 with a remainder of 579.
Write down 6 as next digit of the result. 
Result so far: 76.0
If we take 5214 away from 5793, we end up with 579.
Grab the next digit (3) from the dividend, add it to 579, then carry on: 5793 / 869

Advancing to step 6:
The number 869 fits into 5793 6 times, leaving a remainder of 579.
Record the quotient 6 as the next digit in the result. 
Result so far: 766.0
If we subtract 5214 from 5793, we get 579.
Grab the next digit (5) from the dividend, add it to 579, then carry on: 5795 / 869

Step 7:
If we divide 5795 by 869, we get 6 and a remainder of 581.
Use 6 as the next digit of our solution. 
Result so far: 7666.0
If we subtract 5214 from 5795, we get 581.
Grab the next digit (1) from the dividend, add it to 581, then carry on: 5811 / 869

Advancing to step 8:
If we divide 5811 by 869, we get 6 and a remainder of 597.
Use 6 as the next digit of our solution. 
Result so far: 76666.0
The remainder is 597 after subtracting 5214 from 5811.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5970, and continue the process.

On to step 9:
869 goes into 5970 6 times with a remainder of 756.
Write down 6 as next digit of the result. 
Result so far: 76666.6
The remainder is 756 after subtracting 5214 from 5970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

Step 10:
869 can be fit into 7560 8 times, resulting in a remainder of 608.
Write down 8 as next digit of the result. 
Result so far: 76666.68
Subtracting 6952 from 7560 leaves us with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

Going ahead to step 11:
6080 divided by 869 is 6 with a remainder of 866.
Write down 6 as next digit of the result. 
Result so far: 76666.686
Subtract 5214 from 6080 to get 866.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8660, and continue the process.

Step 12:
If we divide 8660 by 869, we get 9 and a remainder of 839.
Use 9 as the next digit of our solution. 
Result so far: 76666.6869
Deduct 7821 from 8660 and we're left with 839.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8390, and continue the process.

Step 13:
869 goes into 8390 9 times with a remainder of 569.
The number 9 becomes the next digit in our result. 
Result so far: 76666.68699
The remainder is 569 after subtracting 7821 from 8390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

The final result is 76666.68699 with a remainder of 0.000569.