We look at the division of 42930738 by 661 
The aim is to understand the frequency of 661 in 42930738.

Let's proceed to step 1:
661 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 661

Let's proceed to step 2:
When dividing 42 by 661, we get 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 661

Moving on to step 3:
If we divide 429 by 661, we get 0 and a remainder of 429.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 429 after subtracting 0 from 429.
Include the next digit (3) from the dividend after 429, then repeat: 4293 / 661

Moving on to step 4:
661 goes into 4293 6 times with a remainder of 327.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 3966 from 4293, we get 327.
Fetch the next digit (0) from the dividend, attach it to 327 and continue: 3270 / 661

Advancing to step 5:
If we divide 3270 by 661, we get 4 and a remainder of 626.
Use 4 as the next digit of our solution. 
Result so far: 64.0
Deduct 2644 from 3270 and we're left with 626.
Grab the next digit (7) from the dividend, add it to 626, then carry on: 6267 / 661

Let's proceed to step 6:
661 can be fit into 6267 9 times, resulting in a remainder of 318.
Record the quotient 9 as the next digit in the result. 
Result so far: 649.0
Subtracting 5949 from 6267 leaves us with 318.
Bring next digit (3) of the dividend behind the 318 and repeat the process: 3183 / 661

Advancing to step 7:
If we divide 3183 by 661, we get 4 and a remainder of 539.
The next digit of our result is 4. 
Result so far: 6494.0
The remainder is 539 after subtracting 2644 from 3183.
Include the next digit (8) from the dividend after 539, then repeat: 5398 / 661

On to step 8:
If we divide 5398 by 661, we get 8 and a remainder of 110.
The number 8 becomes the next digit in our result. 
Result so far: 64948.0
Deduct 5288 from 5398 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 9:
661 can be fit into 1100 1 times, resulting in a remainder of 439.
The next digit of our result is 1. 
Result so far: 64948.1
If we subtract 661 from 1100, we get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Let's proceed to step 10:
661 goes into 4390 6 times with a remainder of 424.
Record the quotient 6 as the next digit in the result. 
Result so far: 64948.16
If we take 3966 away from 4390, we end up with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Let's proceed to step 11:
If we divide 4240 by 661, we get 6 and a remainder of 274.
Put 6 as the next digit of the answer. 
Result so far: 64948.166
If we take 3966 away from 4240, we end up with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

In conclusion, the division gives 64948.166 with a balance of 0.0274.