66646890 ÷ 369 
The aim is to understand the frequency of 369 in 66646890.

Moving on to step 1:
369 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 369

Advancing to step 2:
369 can be fit into 66 0 times, resulting in a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Bring next digit (6) of the dividend behind the 66 and repeat the process: 666 / 369

Step 3:
369 goes into 666 1 times with a remainder of 297.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 369 from 666 leaves us with 297.
Grab the next digit (4) from the dividend, add it to 297, then carry on: 2974 / 369

On to step 4:
2974 divided by 369 is 8 with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 2952 from 2974 and we're left with 22.
Fetch the next digit (6) from the dividend, attach it to 22 and continue: 226 / 369

Step 5:
When dividing 226 by 369, we get 0 with a remainder of 226.
Record the quotient 0 as the next digit in the result. 
Result so far: 180.0
Deduct 0 from 226 and we're left with 226.
Append the next digit (8) from the dividend to 226 and continue with: 2268 / 369

On to step 6:
369 can be fit into 2268 6 times, resulting in a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 1806.0
Subtracting 2214 from 2268 leaves us with 54.
Append the next digit (9) from the dividend to 54 and continue with: 549 / 369

Let's proceed to step 7:
The number 369 fits into 549 1 times, leaving a remainder of 180.
Put 1 as the next digit of the answer. 
Result so far: 18061.0
Subtracting 369 from 549 leaves us with 180.
Bring next digit (0) of the dividend behind the 180 and repeat the process: 1800 / 369

Advancing to step 8:
369 goes into 1800 4 times with a remainder of 324.
Write down 4 as next digit of the result. 
Result so far: 180614.0
Subtract 1476 from 1800 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Step 9:
When dividing 3240 by 369, we get 8 with a remainder of 288.
Write down 8 as next digit of the result. 
Result so far: 180614.8
If we take 2952 away from 3240, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

On to step 10:
2880 divided by 369 is 7 with a remainder of 297.
Put 7 as the next digit of the answer. 
Result so far: 180614.87
Deduct 2583 from 2880 and we're left 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.

Let's proceed to step 11:
369 goes into 2970 8 times with a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 180614.878
Subtract 2952 from 2970 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 12:
369 goes into 180 0 times with a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 180614.878
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 13:
The number 369 fits into 1800 4 times, leaving a remainder of 324.
Write down 4 as next digit of the result. 
Result so far: 180614.87804
Subtract 1476 from 1800 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

On to step 14:
3240 divided by 369 is 8 with a remainder of 288.
Use 8 as the next digit of our solution. 
Result so far: 180614.878048
If we subtract 2952 from 3240, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Step 15:
If we divide 2880 by 369, we get 7 and a remainder of 297.
The next digit of our result is 7. 
Result so far: 180614.8780487
Subtracting 2583 from 2880 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 16:
If we divide 2970 by 369, we get 8 and a remainder of 18.
The next digit of our result is 8. 
Result so far: 180614.87804878
If we subtract 2952 from 2970, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 180614.87804878 with a remaining 1.8e-08.