We're dividing 78639693 by 400 
The aim is to understand the frequency of 400 in 78639693.

Moving on to step 1:
When dividing 7 by 400, 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 (8) from the dividend, add it to 7, then carry on: 78 / 400

Advancing to step 2:
400 can be fit into 78 0 times, resulting in a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Include the next digit (6) from the dividend after 78, then repeat: 786 / 400

Let's proceed to step 3:
When dividing 786 by 400, we get 1 with a remainder of 386.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 400 from 786 to get 386.
Include the next digit (3) from the dividend after 386, then repeat: 3863 / 400

Advancing to step 4:
400 goes into 3863 9 times with a remainder of 263.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 3600 from 3863 to get 263.
Take the next digit (9) from the dividend and append it to 263, then repeat: 2639 / 400

Advancing to step 5:
400 goes into 2639 6 times with a remainder of 239.
Record the quotient 6 as the next digit in the result. 
Result so far: 196.0
Subtracting 2400 from 2639 leaves us with 239.
Include the next digit (6) from the dividend after 239, then repeat: 2396 / 400

Step 6:
The number 400 fits into 2396 5 times, leaving a remainder of 396.
Use 5 as the next digit of our solution. 
Result so far: 1965.0
Subtracting 2000 from 2396 leaves us with 396.
Take the next digit (9) from the dividend and append it to 396, then repeat: 3969 / 400

Moving on to step 7:
3969 divided by 400 is 9 with a remainder of 369.
Put 9 as the next digit of the answer. 
Result so far: 19659.0
If we subtract 3600 from 3969, we get 369.
Include the next digit (3) from the dividend after 369, then repeat: 3693 / 400

On to step 8:
The number 400 fits into 3693 9 times, leaving a remainder of 93.
Put 9 as the next digit of the answer. 
Result so far: 196599.0
Subtract 3600 from 3693 to get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Going ahead to step 9:
400 goes into 930 2 times with a remainder of 130.
Write down 2 as next digit of the result. 
Result so far: 196599.2
Deduct 800 from 930 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Moving on to step 10:
400 can be fit into 1300 3 times, resulting in a remainder of 100.
Use 3 as the next digit of our solution. 
Result so far: 196599.23
If we subtract 1200 from 1300, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 11:
The number 400 fits into 1000 2 times, leaving a remainder of 200.
The number 2 becomes the next digit in our result. 
Result so far: 196599.232
If we subtract 800 from 1000, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 12:
The number 400 fits into 2000 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 196599.2325
Subtracting 2000 from 2000 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
The number 400 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 196599.2325
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
400 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 196599.2325
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 196599.2325 and a remainder of 0.0.