We divide 66489811 by 619
The aim is to understand the frequency of 619 in 66489811.

Let's proceed to step 1:
If we divide 6 by 619, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 619

Advancing to step 2:
66 divided by 619 is 0 with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 619

Moving on to step 3:
The number 619 fits into 664 1 times, leaving a remainder of 45.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 619 from 664 leaves us with 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 619

On to step 4:
When dividing 458 by 619, we get 0 with a remainder of 458.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 458 to get 458.
Append the next digit (9) from the dividend to 458 and continue with: 4589 / 619

Advancing to step 5:
The number 619 fits into 4589 7 times, leaving a remainder of 256.
The number 7 becomes the next digit in our result. 
Result so far: 107.0
If we subtract 4333 from 4589, we get 256.
Include the next digit (8) from the dividend after 256, then repeat: 2568 / 619

Let's proceed to step 6:
If we divide 2568 by 619, we get 4 and a remainder of 92.
Put 4 as the next digit of the answer. 
Result so far: 1074.0
Deduct 2476 from 2568 and we're left with 92.
Take the next digit (1) from the dividend and append it to 92, then repeat: 921 / 619

Going ahead to step 7:
The number 619 fits into 921 1 times, leaving a remainder of 302.
Use 1 as the next digit of our solution. 
Result so far: 10741.0
Deduct 619 from 921 and we're left with 302.
Fetch the next digit (1) from the dividend, attach it to 302 and continue: 3021 / 619

Advancing to step 8:
3021 divided by 619 is 4 with a remainder of 545.
Use 4 as the next digit of our solution. 
Result so far: 107414.0
If we subtract 2476 from 3021, we get 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Moving on to step 9:
619 goes into 5450 8 times with a remainder of 498.
Use 8 as the next digit of our solution. 
Result so far: 107414.8
The remainder is 498 after subtracting 4952 from 5450.
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 10:
619 can be fit into 4980 8 times, resulting in a remainder of 28.
Write down 8 as next digit of the result. 
Result so far: 107414.88
The remainder is 28 after subtracting 4952 from 4980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 107414.88 and a remainder of 0.028.