We look at the division of 18643291 by 149 
The aim is to understand the frequency of 149 in 18643291.

Let's proceed to step 1:
149 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 149

Advancing to step 2:
149 can be fit into 18 0 times, resulting in a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Include the next digit (6) from the dividend after 18, then repeat: 186 / 149

On to step 3:
When dividing 186 by 149, we get 1 with a remainder of 37.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 149 from 186 to get 37.
Bring next digit (4) of the dividend behind the 37 and repeat the process: 374 / 149

Let's proceed to step 4:
When dividing 374 by 149, we get 2 with a remainder of 76.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 76 after subtracting 298 from 374.
Fetch the next digit (3) from the dividend, attach it to 76 and continue: 763 / 149

Step 5:
763 divided by 149 is 5 with a remainder of 18.
The number 5 becomes the next digit in our result. 
Result so far: 125.0
The remainder is 18 after subtracting 745 from 763.
Append the next digit (2) from the dividend to 18 and continue with: 182 / 149

Moving on to step 6:
When dividing 182 by 149, we get 1 with a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 1251.0
If we subtract 149 from 182, we get 33.
Take the next digit (9) from the dividend and append it to 33, then repeat: 339 / 149

Going ahead to step 7:
149 goes into 339 2 times with a remainder of 41.
Put 2 as the next digit of the answer. 
Result so far: 12512.0
Subtracting 298 from 339 leaves us with 41.
Bring next digit (1) of the dividend behind the 41 and repeat the process: 411 / 149

On to step 8:
149 goes into 411 2 times with a remainder of 113.
The number 2 becomes the next digit in our result. 
Result so far: 125122.0
Subtracting 298 from 411 leaves us with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Moving on to step 9:
149 goes into 1130 7 times with a remainder of 87.
The next digit of our result is 7. 
Result so far: 125122.7
Subtract 1043 from 1130 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 10:
The number 149 fits into 870 5 times, leaving a remainder of 125.
The next digit of our result is 5. 
Result so far: 125122.75
If we subtract 745 from 870, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Step 11:
The number 149 fits into 1250 8 times, leaving a remainder of 58.
Put 8 as the next digit of the answer. 
Result so far: 125122.758
Subtracting 1192 from 1250 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
When dividing 580 by 149, we get 3 with a remainder of 133.
Put 3 as the next digit of the answer. 
Result so far: 125122.7583
Deduct 447 from 580 and we're left with 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

On to step 13:
149 can be fit into 1330 8 times, resulting in a remainder of 138.
The number 8 becomes the next digit in our result. 
Result so far: 125122.75838
Deduct 1192 from 1330 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 14:
149 can be fit into 1380 9 times, resulting in a remainder of 39.
Put 9 as the next digit of the answer. 
Result so far: 125122.758389
Deduct 1341 from 1380 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 15:
The number 149 fits into 390 2 times, leaving a remainder of 92.
Put 2 as the next digit of the answer. 
Result so far: 125122.7583892
The remainder is 92 after subtracting 298 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 16:
149 goes into 920 6 times with a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 125122.75838926
Deduct 894 from 920 and we're left 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.

After the division, we end up with 125122.75838926 and a remainder of 2.6e-08.