7980886 ÷ 166 
The aim is to understand the frequency of 166 in 7980886.

Let's proceed to step 1:
When dividing 7 by 166, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 166

On to step 2:
166 can be fit into 79 0 times, resulting in a remainder of 79.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 79, we get 79.
Fetch the next digit (8) from the dividend, attach it to 79 and continue: 798 / 166

Going ahead to step 3:
166 can be fit into 798 4 times, resulting in a remainder of 134.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 664 away from 798, we end up with 134.
Grab the next digit (0) from the dividend, add it to 134, then carry on: 1340 / 166

On to step 4:
The number 166 fits into 1340 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
The remainder is 12 after subtracting 1328 from 1340.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 166

Let's proceed to step 5:
166 goes into 128 0 times with a remainder of 128.
The next digit of our result is 0. 
Result so far: 480.0
If we subtract 0 from 128, we get 128.
Include the next digit (8) from the dividend after 128, then repeat: 1288 / 166

Advancing to step 6:
If we divide 1288 by 166, we get 7 and a remainder of 126.
The number 7 becomes the next digit in our result. 
Result so far: 4807.0
Subtracting 1162 from 1288 leaves us with 126.
Grab the next digit (6) from the dividend, add it to 126, then carry on: 1266 / 166

Step 7:
When dividing 1266 by 166, we get 7 with a remainder of 104.
Record the quotient 7 as the next digit in the result. 
Result so far: 48077.0
If we subtract 1162 from 1266, we get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 8:
If we divide 1040 by 166, we get 6 and a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 48077.6
Deduct 996 from 1040 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
The number 166 fits into 440 2 times, leaving a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 48077.62
Deduct 332 from 440 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Moving on to step 10:
166 can be fit into 1080 6 times, resulting in a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 48077.626
The remainder is 84 after subtracting 996 from 1080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 11:
If we divide 840 by 166, we get 5 and a remainder of 10.
The next digit of our result is 5. 
Result so far: 48077.6265
Subtracting 830 from 840 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 12:
166 goes into 100 0 times with a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 48077.6265
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 13:
If we divide 1000 by 166, we get 6 and a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 48077.626506
The remainder is 4 after subtracting 996 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
When dividing 40 by 166, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 48077.626506
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 15:
400 divided by 166 is 2 with a remainder of 68.
The next digit of our result is 2. 
Result so far: 48077.62650602
The remainder is 68 after subtracting 332 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

In conclusion, the division gives 48077.62650602 with a balance of 6.8e-08.