We look at the division of 19535862 by 669 
The aim is to understand the frequency of 669 in 19535862.

Step 1:
The number 669 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 669

Moving on to step 2:
19 divided by 669 is 0 with a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 19 leaves us with 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 669

Let's proceed to step 3:
195 divided by 669 is 0 with a remainder of 195.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 195 and we're left with 195.
Grab the next digit (3) from the dividend, add it to 195, then carry on: 1953 / 669

Moving on to step 4:
669 can be fit into 1953 2 times, resulting in a remainder of 615.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1338 from 1953 leaves us with 615.
Append the next digit (5) from the dividend to 615 and continue with: 6155 / 669

On to step 5:
When dividing 6155 by 669, we get 9 with a remainder of 134.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
Subtract 6021 from 6155 to get 134.
Include the next digit (8) from the dividend after 134, then repeat: 1348 / 669

Moving on to step 6:
1348 divided by 669 is 2 with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 292.0
Subtract 1338 from 1348 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 669

On to step 7:
106 divided by 669 is 0 with a remainder of 106.
The number 0 becomes the next digit in our result. 
Result so far: 2920.0
If we take 0 away from 106, we end up with 106.
Fetch the next digit (2) from the dividend, attach it to 106 and continue: 1062 / 669

Advancing to step 8:
669 goes into 1062 1 times with a remainder of 393.
Record the quotient 1 as the next digit in the result. 
Result so far: 29201.0
Subtracting 669 from 1062 leaves us with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

On to step 9:
3930 divided by 669 is 5 with a remainder of 585.
The number 5 becomes the next digit in our result. 
Result so far: 29201.5
Subtracting 3345 from 3930 leaves us with 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Step 10:
669 can be fit into 5850 8 times, resulting in a remainder of 498.
Record the quotient 8 as the next digit in the result. 
Result so far: 29201.58
The remainder is 498 after subtracting 5352 from 5850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

Advancing to step 11:
When dividing 4980 by 669, we get 7 with a remainder of 297.
Write down 7 as next digit of the result. 
Result so far: 29201.587
Subtracting 4683 from 4980 leaves us with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

On to step 12:
The number 669 fits into 2970 4 times, leaving a remainder of 294.
Record the quotient 4 as the next digit in the result. 
Result so far: 29201.5874
If we subtract 2676 from 2970, we get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Going ahead to step 13:
669 can be fit into 2940 4 times, resulting in a remainder of 264.
The next digit of our result is 4. 
Result so far: 29201.58744
Subtract 2676 from 2940 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Our division results in 29201.58744 with a remaining 0.000264.