29638988 divided by 861 
The aim is to understand the frequency of 861 in 29638988.

Moving on to step 1:
When dividing 2 by 861, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 861

Advancing to step 2:
29 divided by 861 is 0 with a remainder of 29.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 29 and we're left with 29.
Include the next digit (6) from the dividend after 29, then repeat: 296 / 861

Going ahead to step 3:
When dividing 296 by 861, we get 0 with a remainder of 296.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 296, we get 296.
Bring next digit (3) of the dividend behind the 296 and repeat the process: 2963 / 861

On to step 4:
2963 divided by 861 is 3 with a remainder of 380.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 380 after subtracting 2583 from 2963.
Fetch the next digit (8) from the dividend, attach it to 380 and continue: 3808 / 861

Going ahead to step 5:
861 goes into 3808 4 times with a remainder of 364.
Put 4 as the next digit of the answer. 
Result so far: 34.0
If we take 3444 away from 3808, we end up with 364.
Grab the next digit (9) from the dividend, add it to 364, then carry on: 3649 / 861

Advancing to step 6:
When dividing 3649 by 861, we get 4 with a remainder of 205.
Use 4 as the next digit of our solution. 
Result so far: 344.0
If we take 3444 away from 3649, we end up with 205.
Take the next digit (8) from the dividend and append it to 205, then repeat: 2058 / 861

Step 7:
861 can be fit into 2058 2 times, resulting in a remainder of 336.
The number 2 becomes the next digit in our result. 
Result so far: 3442.0
Deduct 1722 from 2058 and we're left with 336.
Fetch the next digit (8) from the dividend, attach it to 336 and continue: 3368 / 861

Advancing to step 8:
The number 861 fits into 3368 3 times, leaving a remainder of 785.
Use 3 as the next digit of our solution. 
Result so far: 34423.0
The remainder is 785 after subtracting 2583 from 3368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7850, and continue the process.

Moving on to step 9:
When dividing 7850 by 861, we get 9 with a remainder of 101.
Put 9 as the next digit of the answer. 
Result so far: 34423.9
Deduct 7749 from 7850 and we're left with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Step 10:
If we divide 1010 by 861, we get 1 and a remainder of 149.
Write down 1 as next digit of the result. 
Result so far: 34423.91
Subtract 861 from 1010 to get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

On to step 11:
If we divide 1490 by 861, we get 1 and a remainder of 629.
The number 1 becomes the next digit in our result. 
Result so far: 34423.911
If we take 861 away from 1490, we end up with 629.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6290, and continue the process.

The quotient of the division is 34423.911, and the remainder is 0.0629.