We look at the division of 66181652 by 354 
The aim is to understand the frequency of 354 in 66181652.

Step 1:
354 goes into 6 0 times with 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.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 354

On to step 2:
354 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Take the next digit (1) from the dividend and append it to 66, then repeat: 661 / 354

Going ahead to step 3:
If we divide 661 by 354, we get 1 and a remainder of 307.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 354 away from 661, we end up with 307.
Fetch the next digit (8) from the dividend, attach it to 307 and continue: 3078 / 354

Advancing to step 4:
When dividing 3078 by 354, we get 8 with a remainder of 246.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 2832 from 3078 and we're left with 246.
Append the next digit (1) from the dividend to 246 and continue with: 2461 / 354

Step 5:
When dividing 2461 by 354, we get 6 with a remainder of 337.
Write down 6 as next digit of the result. 
Result so far: 186.0
Subtract 2124 from 2461 to get 337.
Include the next digit (6) from the dividend after 337, then repeat: 3376 / 354

On to step 6:
354 can be fit into 3376 9 times, resulting in a remainder of 190.
The number 9 becomes the next digit in our result. 
Result so far: 1869.0
Subtract 3186 from 3376 to get 190.
Fetch the next digit (5) from the dividend, attach it to 190 and continue: 1905 / 354

Moving on to step 7:
1905 divided by 354 is 5 with a remainder of 135.
The next digit of our result is 5. 
Result so far: 18695.0
Subtract 1770 from 1905 to get 135.
Bring next digit (2) of the dividend behind the 135 and repeat the process: 1352 / 354

On to step 8:
If we divide 1352 by 354, we get 3 and a remainder of 290.
Record the quotient 3 as the next digit in the result. 
Result so far: 186953.0
If we take 1062 away from 1352, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Advancing to step 9:
354 goes into 2900 8 times with a remainder of 68.
The next digit of our result is 8. 
Result so far: 186953.8
If we subtract 2832 from 2900, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 10:
If we divide 680 by 354, we get 1 and a remainder of 326.
Write down 1 as next digit of the result. 
Result so far: 186953.81
Subtracting 354 from 680 leaves us with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Moving on to step 11:
The number 354 fits into 3260 9 times, leaving a remainder of 74.
Use 9 as the next digit of our solution. 
Result so far: 186953.819
Deduct 3186 from 3260 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 12:
When dividing 740 by 354, we get 2 with a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 186953.8192
Subtracting 708 from 740 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 13:
354 goes into 320 0 times with a remainder of 320.
The next digit of our result is 0. 
Result so far: 186953.8192
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 14:
3200 divided by 354 is 9 with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 186953.819209
If we subtract 3186 from 3200, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 15:
354 goes into 140 0 times with a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 186953.819209
Subtracting 0 from 140 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 16:
If we divide 1400 by 354, we get 3 and a remainder of 338.
Put 3 as the next digit of the answer. 
Result so far: 186953.81920903
If we take 1062 away from 1400, we end up with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

The quotient of the division is 186953.81920903, and the remainder is 3.38e-07.