We look at the division of 27851631 by 181 
The aim is to understand the frequency of 181 in 27851631.

Let's proceed to step 1:
When dividing 2 by 181, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 181

Going ahead to step 2:
27 divided by 181 is 0 with a remainder of 27.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 27, we end up with 27.
Fetch the next digit (8) from the dividend, attach it to 27 and continue: 278 / 181

Let's proceed to step 3:
181 goes into 278 1 times with a remainder of 97.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 181 from 278, we get 97.
Take the next digit (5) from the dividend and append it to 97, then repeat: 975 / 181

Let's proceed to step 4:
When dividing 975 by 181, we get 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 15.0
Subtracting 905 from 975 leaves us with 70.
Grab the next digit (1) from the dividend, add it to 70, then carry on: 701 / 181

Moving on to step 5:
When dividing 701 by 181, we get 3 with a remainder of 158.
The number 3 becomes the next digit in our result. 
Result so far: 153.0
If we take 543 away from 701, we end up with 158.
Bring next digit (6) of the dividend behind the 158 and repeat the process: 1586 / 181

Step 6:
If we divide 1586 by 181, we get 8 and a remainder of 138.
The number 8 becomes the next digit in our result. 
Result so far: 1538.0
Deduct 1448 from 1586 and we're left with 138.
Bring next digit (3) of the dividend behind the 138 and repeat the process: 1383 / 181

Step 7:
181 goes into 1383 7 times with a remainder of 116.
Use 7 as the next digit of our solution. 
Result so far: 15387.0
Deduct 1267 from 1383 and we're left with 116.
Fetch the next digit (1) from the dividend, attach it to 116 and continue: 1161 / 181

Moving on to step 8:
The number 181 fits into 1161 6 times, leaving a remainder of 75.
Use 6 as the next digit of our solution. 
Result so far: 153876.0
The remainder is 75 after subtracting 1086 from 1161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 9:
750 divided by 181 is 4 with a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 153876.4
Subtracting 724 from 750 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 10:
181 goes into 260 1 times with a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 153876.41
If we take 181 away from 260, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 11:
When dividing 790 by 181, we get 4 with a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 153876.414
Deduct 724 from 790 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 12:
When dividing 660 by 181, we get 3 with a remainder of 117.
Use 3 as the next digit of our solution. 
Result so far: 153876.4143
Subtracting 543 from 660 leaves us with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 13:
181 goes into 1170 6 times with a remainder of 84.
The next digit of our result is 6. 
Result so far: 153876.41436
Deduct 1086 from 1170 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 14:
The number 181 fits into 840 4 times, leaving a remainder of 116.
The number 4 becomes the next digit in our result. 
Result so far: 153876.414364
Subtract 724 from 840 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

On to step 15:
181 goes into 1160 6 times with a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 153876.4143646
Subtracting 1086 from 1160 leaves us 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.

Let's proceed to step 16:
181 goes into 740 4 times with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 153876.41436464
Deduct 724 from 740 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 153876.41436464, and the remainder is 1.6e-08.